file version checking handled after other errors. (#1641)

Author: deepakvenugopal

source/6LoWPAN/Thread/thread_nvm_store.c

@@ -147,15 +147,18 @@ int thread_nvm_store_mleid_rloc_map_read(thread_nvm_mleid_rloc_map *mleid_rloc_m
 
     int ret = thread_nvm_store_read(lc_data_path, mleid_rloc_map, sizeof(thread_nvm_mleid_rloc_map), &version);
 
+    if (THREAD_NVM_FILE_SUCCESS!=ret) {
+        tr_info("Leader data map read failed");
+        thread_nvm_store_mleid_rloc_map_remove();
+        return ret;
+    }
+
     if (LEADER_INFO_DATA_VERSION!=version) {
         tr_info("Leader data map version mismatch %"PRIu32, version);
         thread_nvm_store_mleid_rloc_map_remove();
         return THREAD_NVM_FILE_VERSION_WRONG;
     }
-    if (THREAD_NVM_FILE_SUCCESS!=ret) {
-        tr_info("Leader data map read failed");
-        thread_nvm_store_mleid_rloc_map_remove();
-    }
+
     return ret;
 }