patch 8.2.0436: no warnings for incorrect printf arguments

Problem:    No warnings for incorrect printf arguments.
Solution:   Fix attribute in declaration.  Fix uncovered mistakes. (Dominique
            Pelle, closes #5834)
diff --git a/src/gui.c b/src/gui.c
index 4733bad..0e008c1 100644
--- a/src/gui.c
+++ b/src/gui.c
@@ -542,7 +542,7 @@
 	    if (STRCMP(use_gvimrc, "NONE") != 0
 		    && STRCMP(use_gvimrc, "NORC") != 0
 		    && do_source(use_gvimrc, FALSE, DOSO_NONE, NULL) != OK)
-		semsg(_("E230: Cannot read from \"%s\""), use_gvimrc, NULL);
+		semsg(_("E230: Cannot read from \"%s\""), use_gvimrc);
 	}
 	else
 	{