memory problem in findElInfo

AMDiS/src/Mesh.cc

@@ -716,8 +716,10 @@ namespace AMDiS {
 	  if (i !=  k && mel->getNeighbour(i) && !macrosVisited.count(mel->getNeighbour(i)->getIndex()))
 	    active.push(mel->getNeighbour(i));    
 	}
-	if (active.empty())
+	if (active.empty()) {
+	  delete mel_info;
 	  return false;
+	}
 	mel = active.top();
 	active.pop();