Mirror modifier: Fix for wrong dependency relations

Mirror modifier was reporting that it depends on geometry of the object
used for mirror center which is incorrect -- only object matrix is needed
for modifier evaluation.

source/blender/modifiers/intern/MOD_mirror.c

@@ -85,8 +85,7 @@ static void updateDepgraph(ModifierData *md, DagForest *forest,
 	if (mmd->mirror_ob) {
 		DagNode *latNode = dag_get_node(forest, mmd->mirror_ob);
 
-		dag_add_relation(forest, latNode, obNode,
-		                 DAG_RL_DATA_DATA | DAG_RL_OB_DATA, "Mirror Modifier");
+		dag_add_relation(forest, latNode, obNode, DAG_RL_OB_DATA, "Mirror Modifier");
 	}
 }