Update BFS.cpp

Fixed issue #179

Author: ashwek

Graph/BFS.cpp

@@ -30,7 +30,7 @@ void graph::printgraph(){
 }
 void graph::bfs(int s){
 	bool *visited = new bool[this->v+1];
-	memset(visited,false,sizeof(visited));
+	memset(visited,false,sizeof(bool)*(this->v+1));
 	visited[s]=true;
 	list<int> q;
 	q.push_back(s);
@@ -57,4 +57,4 @@ int main(){
 	//g.printgraph();
 	g.bfs(2);
 	return 0;
-}
+}