vertexsubmit branch: More robust CFLAGS.
vertexsubmit branch: More robust CFLAGS.

svn path=/branches/libavg_vertexsubmit/; revision=7355

hoodie/libavg,hoodie/libavg,yyd01245/libavg,scotty007/libavg,libavg/libavg,th3infinity/libavg,hoodie/libavg,yyd01245/libavg,yyd01245/libavg,scotty007/libavg,libavg/libavg,scotty007/libavg,libavg/libavg,libavg/libavg,th3infinity/libavg,hoodie/libavg,th3infinity/libavg,yyd01245/libavg,th3infinity/libavg,scotty007/libavg