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give warning if -c/-o overwrites last character of new title

--- a/src/fix/main.c

+++ b/src/fix/main.c

@@ -481,6 +481,12 @@

 			if (!(ulOptions & OPTF_QUIET) && gbc_mode == 0xC0) {

 				printf("\tGame Boy Color only mode set\n");

 			}

+

+			if (ulOptions & OPTF_TITLE) { 

+				if (cartname[0xF]) {

+					Warning("Last character of cartridge title was overwritten by '-%c' option", gbc_mode == 0x80 ? 'c' : 'o');

+				}

+			}

 		}

 		/*

 		 * -v (Validate header) option code