Fixed Coverity reported issue.
Fixed Coverity reported issue.

CID 11636: Allocation size mismatch (SIZECHECK)
"my_alloc(sizeof (struct PlyProperty) /*36*/ * elem->nprops, 1292, "..\\..\\..\\..\\src\\osgPlugins\\ply\\plyfile.cpp")" allocates memory. [show details]
Allocating a multiple of 36 bytes to pointer "other->props", which needs 8 bytes.



koshman86/osg,stmh/osg,artoolkit/osg,XiaoCC/osg,XiaoCC/osg,ntoand/osg,ntoand/osg,stmh/osg,ghub/osg,ghub/osg,ntoand/osg,koshman86/osg,stmh/osg,stmh/osg,XiaoCC/osg,koshman86/osg,koshman86/osg,artoolkit/osg,omega-hub/osg,ghub/osg,ghub/osg,ntoand/osg,omega-hub/osg,artoolkit/osg,XiaoCC/osg,artoolkit/osg,omega-hub/osg,omega-hub/osg,XiaoCC/osg,stmh/osg