lib/safe_creat: add const qualifier to path name

Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com>
diff --git a/lib/safe_macros.c b/lib/safe_macros.c
index 9c0ba8d..a3d997c 100644
--- a/lib/safe_macros.c
+++ b/lib/safe_macros.c
@@ -66,7 +66,7 @@
 
 int
 safe_creat(const char *file, const int lineno, void (*cleanup_fn) (void),
-	   char *pathname, mode_t mode)
+	   const char *pathname, mode_t mode)
 {
 	int rval;