Warn on mistyped arguments to stk_printf().

diff --git a/lib/stkstring.h b/lib/stkstring.h
index 75508fbb74cde3a64d210d6c890eff9a8d32b1b0..735d63e280fe0292d12f5f70e40d88ca3dcafaf6 100644 (file)
--- a/lib/stkstring.h
+++ b/lib/stkstring.h
@@ -18,6 +18,6 @@
 
 uns stk_array_len(char **s, uns cnt);
 void stk_array_copy(char *x, char **s, uns cnt);
-uns stk_printf_internal(char *x, ...);
+uns stk_printf_internal(char *x, ...) __attribute__((format(printf,1,2)));
 
 extern char *stk_printf_buf;