eval.c: suppress warning

* eval.c (rb_protect): get rid of false clobbered warning.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43535 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

eval.c

@@ -778,7 +778,7 @@ VALUE
 rb_protect(VALUE (* proc) (VALUE), VALUE data, int * state)
 {
     volatile VALUE result = Qnil;
-    int status;
+    volatile int status;
     rb_thread_t *th = GET_THREAD();
     rb_control_frame_t *cfp = th->cfp;
     struct rb_vm_protect_tag protect_tag;
@@ -792,6 +792,9 @@ rb_protect(VALUE (* proc) (VALUE), VALUE data, int * state)
     if ((status = TH_EXEC_TAG()) == 0) {
 	SAVE_ROOT_JMPBUF(th, result = (*proc) (data));
     }
+    else {
+	th->cfp = cfp;
+    }
     MEMCPY(&(th)->root_jmpbuf, &org_jmpbuf, rb_jmpbuf_t, 1);
     th->protect_tag = protect_tag.prev;
     TH_POP_TAG();
@@ -799,10 +802,6 @@ rb_protect(VALUE (* proc) (VALUE), VALUE data, int * state)
     if (state) {
 	*state = status;
     }
-    if (status != 0) {
-	th->cfp = cfp;
-	return Qnil;
-    }
 
     return result;
 }