make parse_line_column() consistent with the color regex-parsing code

and go back to returning an error on strings like "3,"


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@2617 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

src/utils.c

@@ -118,9 +118,7 @@ bool parse_line_column(const char *str, int *line, ssize_t *column)
     comma = strchr(str, ',');
 
     if (comma != NULL && column != NULL) {
-	const char *str_line = str + (comma - str + 1);
-
-	if (str_line[0] != '\0' && !parse_num(str_line, column))
+	if (!parse_num(str + (comma - str + 1), column))
 	    retval = FALSE;
     }