Fix invert flag not being zero initialized

src/cmd.cpp

@@ -25,7 +25,7 @@
 #include <cstdlib> //atol
 
 cmd_args::cmd_args(void)noexcept:
-	truecol(0), color(0), number(0), ends(0), squeeze(0), tabs(0), nonprinting(0), treatbinary(0), error(0), usage(0), version(0){}
+	truecol(0), color(0), invert(0), number(0), ends(0), squeeze(0), tabs(0), nonprinting(0), treatbinary(0), error(0), usage(0), version(0){}
 void cmd_args::clear_gnu_options(void){
 	number = PRINT_LINE_NEVER;
 	ends = squeeze = tabs = nonprinting = 0;