Fix 'zero-size array is extension' Clang warning in os_dep (Linux/x86)

* os_dep.c [I386 && LINUX && SAVE_CALL_CHAIN] (struct frame): Do not
declare fr_arg[NARGS] field if NARGS is zero.

diff --git a/os_dep.c b/os_dep.c
index 987158a..0fb5ccc 100644 (file)
--- a/os_dep.c
+++ b/os_dep.c
@@ -4384,7 +4384,9 @@ GC_API int GC_CALL GC_get_pages_executable(void)
     struct frame {
         struct frame *fr_savfp;
         long    fr_savpc;
-        long    fr_arg[NARGS];  /* All the arguments go here.   */
+#       if NARGS > 0
+          long  fr_arg[NARGS];  /* All the arguments go here.   */
+#       endif
     };
 #endif