Add a missing #include

This was left out from d5c7c7f

diff --git a/source/glsl/optimize.cpp b/source/glsl/optimize.cpp
index 8cbf24e1be0309a2c8304051cc185d9316836974..8d3eca9e1f92841c2ca35346d7407a58e82fd394 100644 (file)
--- a/source/glsl/optimize.cpp
+++ b/source/glsl/optimize.cpp
@@ -1,4 +1,5 @@
 #include <msp/core/raii.h>
+#include <msp/strings/format.h>
 #include "optimize.h"
 
 using namespace std;