Initialize variable

Author: Coccocoahelper

src/main/java/me/lrxh/practice/util/PlaceholderUtil.java

@@ -140,7 +140,7 @@ public String getHitCombo(Player player, boolean isMMCCombo) {
         Match match = profile.getMatch();
         Integer playerCombo = match.getGamePlayer(player).getCombo();
         Integer opponentCombo = match.getGamePlayer(match.getOpponent(player.getUniqueId())).getCombo();
-        String hitCombo;
+        String hitCombo = "";
 
         if (playerCombo > 1) {
             hitCombo = "&a" + playerCombo + " Combo";