--- 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;

 		}

 	}