Fix format string

(I don't know if this is exploitable - depends what libpng does)

diff --git a/modules/codec/png.c b/modules/codec/png.c
index 2b04b965ea53f494e3c8b96cf360799506a1b1c3..6cc2a2f6b64a4a02176d6e2973a6ab56cd6e7a03 100644 (file)
--- a/modules/codec/png.c
+++ b/modules/codec/png.c
@@ -106,13 +106,13 @@ static void user_error( png_structp p_png, png_const_charp error_msg )
 {
     decoder_t *p_dec = (decoder_t *)png_get_error_ptr( p_png );
     p_dec->p_sys->b_error = true;
-    msg_Err( p_dec, error_msg );
+    msg_Err( p_dec, "%s", error_msg );
 }
 
 static void user_warning( png_structp p_png, png_const_charp warning_msg )
 {
     decoder_t *p_dec = (decoder_t *)png_get_error_ptr( p_png );
-    msg_Warn( p_dec, warning_msg );
+    msg_Warn( p_dec, "%s", warning_msg );
 }
 
 /****************************************************************************