COMP: Defining YY_NO_INPUT to remove compilation of unused yyinput function. It was producing a warning about unreachable code.

Source/cmListFileLexer.c

@@ -508,6 +508,7 @@ Modify cmListFileLexer.c:
 
 /* Disable features we do not need. */
 #define YY_NEVER_INTERACTIVE 1
+#define YY_NO_INPUT 1
 #define YY_NO_UNPUT 1
 #define YY_NO_UNISTD_H 1
 #define ECHO

Source/cmListFileLexer.in.l

@@ -34,6 +34,7 @@ Modify cmListFileLexer.c:
 
 /* Disable features we do not need. */
 #define YY_NEVER_INTERACTIVE 1
+#define YY_NO_INPUT 1
 #define YY_NO_UNPUT 1
 #define YY_NO_UNISTD_H 1
 #define ECHO