Replaced enum in cc65.h by defines. added comment that cc65 exit constants should not redefine 0 and 1 as they are reserved for exit_success and exit_failure

libsrc/dbg/dbg.c

@@ -14,7 +14,6 @@
 #include <ctype.h>
 #include <6502.h>
 #include <dbg.h>
-#include <cc65.h>
 
 
 /*****************************************************************************/
@@ -1583,7 +1582,7 @@ void DbgEntry (void)
                 
                 /* Exit intentionally with error because one may
                    say that DbgEntry is always abnormal. */
-                exit (CC65_EXIT_FAILURE);
+                exit (EXIT_FAILURE);
         
         }
     }