add missing trailing newlines in error() calls

src/drv_imap.c

@@ -1682,7 +1682,7 @@ prepare_box( char **buf, const imap_store_t *ctx )
 		if (!memcmp( name, "INBOX", 5 )) {
 			pfx = "";
 		} else if (!*pfx) {
-			error( "IMAP error: cannot use unqualified '%s'. Did you mean INBOX?", name );
+			error( "IMAP error: cannot use unqualified '%s'. Did you mean INBOX?\n", name );
 			return -1;
 		}
 	}

src/drv_maildir.c

@@ -1533,7 +1533,7 @@ maildir_fetch_msg( store_t *gctx, message_t *gmsg, msg_data_t *data, int minimal
 	}
 	fstat( fd, &st );
 	if (st.st_size > INT_MAX) {
-		error( "Maildir error: %s is too big", buf );
+		error( "Maildir error: %s is too big\n", buf );
 		goto mbad;
 	}
 	data->len = st.st_size;