Fix require(): if load() fails with exception, don't report a "symbol

not defined" exception, just report the load() exception - whatever it was
(e.g. could not open load-file).

src/sbbs3/js_global.c

@@ -723,12 +723,13 @@ js_require(JSContext *cx, uintN argc, jsval *arglist)
 
 	ret = js_load(cx, argc-1, arglist);
 
-	// TODO: this error is happening if the file doesn't exist!
-	if (!JS_HasProperty(cx, exec_obj, property, &found) || !found) {
-		JSVALUE_TO_MSTRING(cx, argv[fnarg], filename, NULL);
-		JS_ReportError(cx,"symbol '%s' not defined by script '%s'", property, filename);
-		free(filename);
-		return(JS_FALSE);
+	if (!JS_IsExceptionPending(cx)) {
+		if (!JS_HasProperty(cx, exec_obj, property, &found) || !found) {
+			JSVALUE_TO_MSTRING(cx, argv[fnarg], filename, NULL);
+			JS_ReportError(cx,"symbol '%s' not defined by script '%s'", property, filename);
+			free(filename);
+			return(JS_FALSE);
+		}
 	}
 	free(property);
 	return ret;