[CORE] Fix dereferencing NULL pointer 'ptemp_obj' in AggregateDefClass::Find_Subobject() (#1147)

Author: xezon

Core/Libraries/Source/WWVegas/WW3D2/agg_def.cpp

@@ -256,6 +256,9 @@ AggregateDefClass::Find_Subobject
 
 				// Is this the subobject we were looking for?
 				RenderObjClass *ptemp_obj = parent_model->Get_Sub_Object_On_Bone (subobj_index, bone_index);
+				if (ptemp_obj == NULL)
+					continue;
+
 				if (::lstrcmpi (ptemp_obj->Get_Name (), mesh_path[index]) == 0) {
 					sub_obj = ptemp_obj;
 				} else {