skip unecessary merge in dist process

Signed-off-by: Nico Schottelius <nico@brief.schottelius.org>

build

@@ -168,11 +168,15 @@ notes
         target_branch=${version%\.*}
         current_branch=$(git rev-parse --abbrev-ref HEAD)
 
+        if [ "$target_branch" = "$current_branch" ]; then
+            echo "Skipping merge, already on destination branch"
+        else
             printf "Press enter to git merge $current_branch into \"$target_branch\" > "
             read prompt
             git checkout "$target_branch"
             git merge "$current_branch"
             git checkout "$current_branch"
+        fi
    ;;
 
     dist-archlinux)