prevent circularshifting an empty vector

this crashes for example, this is attempted if you have a musicwheel size of 0 (which is possible)
etternagame · Sep 16, 2020 · 2eb4c98 · 2eb4c98
1 parent b7c49cd
commit 2eb4c98
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/src/RageUtil/Utils/RageUtil.h b/src/RageUtil/Utils/RageUtil.h
@@ -186,6 +186,8 @@ void
 CircularShift(std::vector<T>& v, int dist)
 {
 	for (int i = std::abs(dist); i > 0; i--) {
+		if (v.size() == 0)
+			break;
 		if (dist > 0) {
 			T t = v[0];
 			v.erase(v.begin());