* src/gxvalid/gxvbsln.c, src/gxvalid/gxvcommn.c, src/gxvalid/gxvfeat.c,
        src/gxvalid/gxvjust.c, src/gxvalid/gxvkern.c, src/gxvalid/gxvlcar.c,
        src/gxvalid/gxvmort.c, src/gxvalid/gxvmort0.c, src/gxvalid/gxvmort1.c,
        src/gxvalid/gxvmort2.c, src/gxvalid/gxvmort4.c, src/gxvalid/gxvmort5.c,
        src/gxvalid/gxvmorx.c, src/gxvalid/gxvmorx0.c, src/gxvalid/gxvmorx1.c,
        src/gxvalid/gxvmorx2.c, src/gxvalid/gxvmorx5.c, src/gxvalid/gxvopbd.c,
        src/gxvalid/gxvprop.c, src/sfnt/sfdriver.c, src/truetype/ttgload.c:
          removing _many_ compiler warnings when compiling with Visual C++
          at maximum level (/W4)