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register_changed_p actually returns bool, but return type is still int. This patch changes the return type to bool. The caller of register_changed_p also checked whether the return value can be negative, which is not needed now. Such check was added in fb40c2090 in 2000, at that moment, register_changed_p returns -1 when read_relative_register_raw_bytes fails. I can tell from its name that it reads register contents, but we don't have this function called inside register_changed_p, and the regcache is read-only. gdb: 2017-11-24 Yao Qi <yao.qi@linaro.org> * mi/mi-main.c (mi_cmd_data_list_changed_registers): Remove local 'changed'. Remove error. (register_changed_p): Change return type to bool.
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