st-adjustment: Add missing math.h include

diff --git a/src/st/st-adjustment.c b/src/st/st-adjustment.c
index e6b33670cd36a19e7a9beacd3e5a031525329c1a..45264ce4a935147b1e7a3fe860c53bf4381376d8 100644 (file)
--- a/src/st/st-adjustment.c
+++ b/src/st/st-adjustment.c
@@ -32,6 +32,7 @@
 
 #include <glib-object.h>
 #include <clutter/clutter.h>
+#include <math.h>
 
 #include "st-adjustment.h"
 #include "st-private.h"