Added -Wall and -pipe to default compiler flags.
Added -Wall and -pipe to default compiler flags.

svn path=/trunk/libavg/; revision=6441

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