include stdint.h for int32_t/uint32_t

Signed-off-by: Jussi Kukkonen <jussi.kukkonen@intel.com>
Reviewed-by: Yong Bakos <ybakos@humanoriented.com>
diff --git a/compositor/main.c b/compositor/main.c
index 1f75ae0..99cb868 100644
--- a/compositor/main.c
+++ b/compositor/main.c
@@ -33,6 +33,7 @@
 #include <signal.h>
 #include <errno.h>
 #include <dlfcn.h>
+#include <stdint.h>
 #include <string.h>
 #include <sys/utsname.h>
 #include <sys/stat.h>