Fix for bug #5325 - curve deform tool doesn't work correctly

This bug was caused by broken's recent patch to make the Curve modifier
determine its axis from the modifier panel, rather than the object's track
axis. In the case where a Curve modifier is applied by parenting the object
to the curve, the curve axis needs to be copied from the object's track axis
in modifiers_getVirtualModifierList(). This commit adds the necessary copy.

source/blender/blenkernel/intern/modifier.c

@@ -3801,6 +3801,7 @@ ModifierData *modifiers_getVirtualModifierList(Object *ob)
 			return &amd.modifier;
 		} else if(ob->parent->type==OB_CURVE && ob->partype==PARSKEL) {
 			cmd.object = ob->parent;
+			cmd.defaxis = ob->trackflag + 1;
 			cmd.modifier.next = ob->modifiers.first;
 			return &cmd.modifier;
 		} else if(ob->parent->type==OB_LATTICE && ob->partype==PARSKEL) {