Fixed build on 64bit systems (type mismatch in comparison)

source/bfutil/bfindex.c

@@ -193,7 +193,7 @@ int main(int argc, char *argv[])
 	(void)setlocale(LC_ALL, "");
 	/* Set our name (for logging only) */
 	
-	while( (c = getopt(argc, argv, "hf")) != EOF )
+	while( (c = getopt(argc, argv, "hf")) != (char)-1 )
 	{
 		switch( c ) {
 		case 'f':
@@ -204,8 +204,9 @@ int main(int argc, char *argv[])
 			exit(0);
 		default:
 			usage();
-			exit(1);
+			exit(5);
 		}
+		
 	}
 
 	if( conf_readconf(conf_getconfname(), 0) )
@@ -216,7 +217,7 @@ int main(int argc, char *argv[])
 	if( log_open(log_getfilename(LOG_FILE_SESSION), NULL, NULL) )
 	{
 		log("can't continue without logging");
-		exit(1);
+		exit(2);
 	}
 	
 	/* Ignore some terminating signals */

source/bfutil/bfstat.c

@@ -253,7 +253,7 @@ int main(int argc, char *argv[])
 	
 	bfstat_opts_default(&opts);
 	
-	while( (c = getopt(argc, argv, "acfhn:prst")) != EOF )
+	while( (c = getopt(argc, argv, "acfhn:prst")) != (char)-1 )
 	{
 		switch( c ) {
 		case 'h':

source/bfutil/nlookup.c

@@ -135,7 +135,7 @@ int main(int argc, char *argv[])
 	/* Initialise current locale */
 	(void)setlocale(LC_ALL, "");
 	
-	while( (ch=getopt(argc, argv, "hrm")) != EOF )
+	while( (ch=getopt(argc, argv, "hrm")) != (char)-1 )
 	{
 		switch( ch ) {
 		case 'h':