修复udid重复计算。Review by 阿达。

@@ -166,7 +166,7 @@ static NSString * const kYohoBuyUdid = @"com.yoho.buy.udid";
         NSMutableDictionary *keychainnamepasswordKVPairs = (NSMutableDictionary *)[YH_KeychainStore load:kYohoSecretInfo];
         NSString * udidString =  [keychainnamepasswordKVPairs objectForKey:kYohoBuyUdid];
         
-        if (shareUdidString == nil || shareUdidString.length == 0) {
+        if (udidString == nil || udidString.length == 0) {
             NSString* lvstring = [OpenUDID valueWithError:nil];
             NSMutableDictionary * yohoinfoKVPairs = [NSMutableDictionary dictionary];
             [yohoinfoKVPairs setObject:lvstring forKey:kYohoBuyUdid];