Check if an update process is up and running before begin a new one

Author: pennam

src/Arduino_ESP32_OTA.cpp

@@ -80,7 +80,12 @@ Arduino_ESP32_OTA::Error Arduino_ESP32_OTA::begin()
   /* initialize private variables */
   _ota_size = 0;
   _ota_header = {0};
-  
+
+  if(Update.isRunning()) {
+    Update.abort();
+    DEBUG_DEBUG("%s: Aborting running update", __FUNCTION__);
+  }
+
   if(!Update.begin(UPDATE_SIZE_UNKNOWN)) {
     DEBUG_ERROR("%s: failed to initialize flash update", __FUNCTION__);
     return Error::OtaStorageInit;