SemiCoherentUtils.c: Build warning when using Conda compiler

SemiCoherentUtils.c: In function 'XLALBinaryToSFTVector':
SemiCoherentUtils.c:1461:5: warning: ignoring return value of 'fread', declared with attribute warn_unused_result [-Wunused-result]
     fread( &dummy, sizeof( REAL4 ), 1, binfp );
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~