Avoid non-standard conditionals with omitted operands.

Fixes bug #257.

Change-Id: I05fc6468306d46399e769098e031e7e588798afc
Signed-off-by: R. Diez <rdiezmail-openocd@yahoo.de>
Reviewed-on: http://openocd.zylin.com/6271
Tested-by: jenkins
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>

src/jtag/adapter.c

@@ -62,7 +62,7 @@ static int jim_adapter_name(Jim_Interp *interp, int argc, Jim_Obj * const *argv)
 		return JIM_ERR;
 	}
 	const char *name = adapter_driver ? adapter_driver->name : NULL;
-	Jim_SetResultString(goi.interp, name ? : "undefined", -1);
+	Jim_SetResultString(goi.interp, name ? name : "undefined", -1);
 	return JIM_OK;
 }