Fix strict aliasing warnings.

[QuLogic]

TBH, I wrote this quite a while ago when packaging this, so I don't quite remember everything. It fixes warnings like the following, though I think it might use some GCCisms:

mars2mseed.c: In function 'mars2group':
mars2mseed.c:238:3: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
   mbGetStationCode(hMS->block), mbGetChan(hMS->block),
   ^~~~~~~~~~~~~~~~
mars2mseed.c:239:3: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
   mbGetSampRate(hMS->block), mbGetScale(hMS->block),
   ^~~~~~~~~~~~~
mars2mseed.c:239:3: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
mars2mseed.c:240:3: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
   mbGetTime(hMS->block),
   ^~~~~~~~~
mars2mseed.c:240:3: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
mars2mseed.c:240:3: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
mars2mseed.c:241:3: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
   marsBlockGetScaleFactor(hMS->block), mbGetMaxamp(hMS->block));
   ^~~~~~~~~~~~~~~~~~~~~~~
mars2mseed.c:278:4: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
    msr->samprate = mbGetSampRate(hMS->block);
    ^~~
mars2mseed.c:279:4: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
    msr->starttime = MS_EPOCH2HPTIME (mbGetTime(hMS->block));
    ^~~
mars2mseed.c:279:4: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
mars2mseed.c:279:4: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
mars2mseed.c:295:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
     if ( *(clp->key) == ('0' + (int)mbGetChan(hMS->block)) )
     ^~
mars2mseed.c:308:4: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
    transmatrix[transchan][(int)mbGetChan(hMS->block)]);
    ^~~~~~~~~~~
mars2mseed.c:313:8: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
        snprintf (msr->channel, 10, "%d", mbGetChan(hMS->block));
        ^~~~~~~~
mars2mseed.c:317:4: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
    if ( mbGetBlockFormat(hMS->block) == DATABLK_FORMAT )
    ^~
mars2mseed.c:318:6: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
      if ( ((m88Head *)(hMS->block))->time.delta != NO_WORD )
      ^~
mars2mseed.c:320:9: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
         ((m88Head *)(hMS->block))->time.delta,
         ^
marsio.c: In function 'marsStreamGetNextBlock':
marsio.c:430:7: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
       if ( mbGetMagic(MS.block) == LEMAGICbe )
       ^~
marsio.c:431:2: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
  switch ( ((leFormat *) &(MS.block))->block_format )
  ^~~~~~
marsio.c:447:3: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
   mbGetMagic(MS.block),mbGetBlockFormat(MS.block),mbGetDataFormat(MS.block),
   ^~~~~~~~~~
marsio.c:447:3: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
marsio.c:447:3: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
marsio.c:448:3: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
   mbGetChan(MS.block));
   ^~~~~~~~~
marsio.c:450:7: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
       if ( isMarsDataBlock(MS.block) && mbGetChan(MS.block) < 3 )
       ^~