[warning reduction 08/11] Add the gnu_printf format attributes; silences a warning.

[Jeremy White <jwhite@xxxxxxxxxxxxxxx>]

---
 src/qxl_mem.c |    3 +++
 1 file changed, 3 insertions(+)


diff --git a/src/qxl_mem.c b/src/qxl_mem.c
index c32eba6..fc3d6d1 100644
--- a/src/qxl_mem.c
+++ b/src/qxl_mem.c
@@ -54,6 +54,9 @@ qxl_mem_unverifiable(struct qxl_mem *mem)
 #endif
 
 static void
+errout (void *data, const char *format, ...) __attribute__((format(printf, 2, 3)));
+
+static void
 errout (void *data, const char *format, ...)
 {
     va_list va;

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