Add missing include

lukas-w · lukas-w · commit a233291c271a · 2019-02-27T09:50:48.000+01:00
Compilation fails with debug build. Fixes regression from dd99f3a
diff --git a/src/core/MixHelpers.cpp b/src/core/MixHelpers.cpp
@@ -23,6 +23,9 @@
  */
 
 #include "MixHelpers.h"
+
+#include <cstdio>
+
 #include "lmms_math.h"
 #include "ValueBuffer.h"
 
