More duplicate code removal in VertexArray.
More duplicate code removal in VertexArray.

svn path=/trunk/libavg/; revision=3388

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