allocate client-side data for VBO

WFObj.cc

@@ -478,6 +478,12 @@ bool WFObj::buildVBO()
     }
     if (texture_ref_count == 0)
         do_textures = false;
+    size_t n_floats_per_vref =
+        3 + /* vertex coordinates */
+        (do_textures ? 2 : 0) + /* texture coordinates */
+        3;  /* normal coordinates */
+    GLfloat * data = new GLfloat[n_floats_per_vref * flat_vertices.size()];
+    delete[] data;
     return true;
 }