Commit ChangeLog during releaseprep if changed

misc/releaseprep

@@ -34,7 +34,13 @@ show_usage() {
 }
 
 git_log() {
-	git log $(git rev-list -n 1 $1)..HEAD --name-only --no-merges --pretty=format:"- - - - - - - - - - - - - - - %n%w(75)Commit %h (%ai) by %aN %n %s %n %b" > ChangeLog
+        DIFF=$(git log -1 --pretty="%s")
+        if [ "$DIFF" != "Update ChangeLog" ]; then
+	  git log $(git rev-list -n 1 $1)..HEAD --name-only --no-merges --pretty=format:"- - - - - - - - - - - - - - -%n%w(75)Commit %h (%ai) by %aN%n %s %n %b" > ChangeLog
+          git add ChangeLog
+          git commit -m "Update ChangeLog"
+          git push origin develop
+        fi
 }
 
 regenerate_changelog() {
@@ -132,12 +138,6 @@ echo "Regenerating ChangeLog file..."
 regenerate_changelog $LASTVER
 echo ""
 
-# Commit ChangeLog to develop branch before proceeding
-# (otherwise it never gets done!)
-git add ChangeLog
-git commit -m "Update ChangeLog"
-git push origin develop
-
 # Change default make from "debug" to "eggdrop"...
 echo -n "Changing default make..."
 change_default_make