repo-add: print warning if same version already exists

Simple fix for FS#13414.

Signed-off-by: Xavier Chantry <shiningxc@gmail.com>
Signed-off-by: Dan McGee <dan@archlinux.org>

scripts/repo-add.sh.in

@@ -172,12 +172,16 @@ db_write_entry()
 		return 1
 	fi
 
-	# remove an existing entry if it exists, ignore failures
-	db_remove_entry "$pkgname"
-
 	startdir=$(pwd)
 	pushd "$gstmpdir" 2>&1 >/dev/null
 
+	if [ -d "$pkgname-$pkgver" ]; then
+		warning "$(gettext "An entry for '%s' already existed")" "$pkgname-$pkgver"
+	fi
+
+	# remove an existing entry if it exists, ignore failures
+	db_remove_entry "$pkgname"
+
 	# create package directory
 	mkdir "$pkgname-$pkgver"
 	cd "$pkgname-$pkgver"