swab(1): fix type errors

src/npc.c

@@ -25,7 +25,7 @@
 char *program_name = "npc";
 
 static int
-ioerr(char *argv0, int err) {
+ioerr(char *argv0) {
 	perror(argv0);
 
 	return EX_IOERR;
@@ -68,7 +68,7 @@ int main(int argc, char *argv[]) {
 				break;
 			case '\n':
 				if (showend && fputc('$', stdout) == EOF) {
-					return ioerr(argv[0]); }
+					return ioerr(argv[0]);
 				}
 			default:
 				if (c >= ' ' || c == '\n' || (!showtab && c == '\t')) {

src/swab.rs

@@ -75,20 +75,20 @@ fn main() -> ExitCode {
 				if let Err(e) = output.write(&right)
 						.and_then(|_| output.write(&left)) {
 					err(&argv[0], e);
-					break EX_IOERR // write error
+					break ExitCode::from(EX_IOERR as u8) // write error
 				}
 
 			},
 			Ok(v) => { // partial read; partially write
 				if let Err(e) = output.write(&buf[..v]) {
 					err(&argv[0], e);
-					break EX_IOERR // write error
+					break ExitCode::from(EX_IOERR as u8) // write error
 				}
 			},
 			Err(e) if e.kind() == ErrorKind::Interrupted && force => continue,
 			Err(e) => {
 				err(&argv[0], e);
-				break EX_IOERR // read error (or signal)
+				break ExitCode::from(EX_IOERR as u8) // read error (or signal)
 			}
 		}
 	}