0023917: Primitive Array with reserved but unused Edges array drawn corrupted from VBO

diff --git a/src/OpenGl/OpenGl_PrimitiveArray.cxx b/src/OpenGl/OpenGl_PrimitiveArray.cxx
index 8e71c6a3a9efea5cd3f3003ad6b206c015560fef..02a14a6db0a53f4088f82842f9fd947a09304565 100755 (executable)
--- a/src/OpenGl/OpenGl_PrimitiveArray.cxx
+++ b/src/OpenGl/OpenGl_PrimitiveArray.cxx
@@ -85,7 +85,8 @@ Standard_Boolean OpenGl_PrimitiveArray::BuildVBO (const Handle(OpenGl_Workspace)
     return Standard_False;
   }
 
-  if (myPArray->edges != NULL)
+  if (myPArray->edges != NULL
+   && myPArray->num_edges > 0)
   {
     myVbos[VBOEdges] = new OpenGl_IndexBuffer();
     if (!myVbos[VBOEdges]->Init (aGlCtx, 1, myPArray->num_edges, (GLuint* )myPArray->edges))