--- src/KeyFrame.cpp.return-type	2020-02-08 21:19:34.000000000 +0000
+++ src/KeyFrame.cpp	2020-02-10 16:06:07.813585059 +0000
@@ -90,8 +90,13 @@
 		assert(target <= right.co.X);
 		switch (right.interpolation) {
 		case CONSTANT: return left.co.Y;
+		        break;
 		case LINEAR: return InterpolateLinearCurve(left, right, target);
+		      break;
 		case BEZIER: return InterpolateBezierCurve(left, right, target, allowed_error);
+		      break;
+		default: return false;
+		  break;
 		}
 	}