sign-compare warnings fixes
sign-compare warnings fixes

blaquee/cppformat,wangshijin/cppformat,blaquee/cppformat,lightslife/cppformat,dean0x7d/cppformat,Jopie64/cppformat,Jopie64/cppformat,lightslife/cppformat,cppformat/cppformat,mojoBrendan/fmt,Jopie64/cppformat,alabuzhev/fmt,wangshijin/cppformat,blaquee/cppformat,dean0x7d/cppformat,seungrye/cppformat,cppformat/cppformat,alabuzhev/fmt,seungrye/cppformat,nelson4722/cppformat,nelson4722/cppformat,dean0x7d/cppformat,nelson4722/cppformat,mojoBrendan/fmt,seungrye/cppformat,mojoBrendan/fmt,alabuzhev/fmt,cppformat/cppformat,lightslife/cppformat,wangshijin/cppformat