scalar-delete: do not 'die()' in 'delete_enlistment()'

Rather than exiting with 'die()' when 'delete_enlistment()' encounters an
error, return an error code with the appropriate message. There's no need
for an abrupt exit with 'die()' in 'delete_enlistment()' because its only
caller ('cmd_delete()') properly cleans up allocated resources and returns
the 'delete_enlistment()' return value as its own exit code.

Signed-off-by: Victoria Dye <vdye@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

contrib/scalar/scalar.c

@@ -407,7 +407,7 @@ static int delete_enlistment(struct strbuf *enlistment)
 #endif
 
 	if (unregister_dir())
-		die(_("failed to unregister repository"));
+		return error(_("failed to unregister repository"));
 
 #ifdef WIN32
 	/*
@@ -418,13 +418,16 @@ static int delete_enlistment(struct strbuf *enlistment)
 	path_sep = find_last_dir_sep(enlistment->buf + offset);
 	strbuf_add(&parent, enlistment->buf,
 		   path_sep ? path_sep - enlistment->buf : offset);
-	if (chdir(parent.buf) < 0)
+	if (chdir(parent.buf) < 0) {
-		die_errno(_("could not switch to '%s'"), parent.buf);
+		int res = error_errno(_("could not switch to '%s'"), parent.buf);
+		strbuf_release(&parent);
+		return res;
+	}
 	strbuf_release(&parent);
 #endif
 
 	if (remove_dir_recursively(enlistment, 0))
-		die(_("failed to delete enlistment directory"));
+		return error(_("failed to delete enlistment directory"));
 
 	return 0;
 }