pvp：修复赛季相关

shared/pubUtils/data.ts

@@ -460,6 +460,7 @@ export function getPvpHeroRewardsByScore(score: number) {
 }
 
 export function getPvpRankRewardsByRank(rankLv: number) {
+    if(rankLv == 0) return null
     for (let item of gameData.pvpRankRewards) {
         if ((item.max >= rankLv || item.max == -1) && rankLv >= item.min) {
             return item;