[WiFiScan] Fix clear 'scanning bit' and clear scanCount

`WIFI_SCANNING_BIT` may not always be cleared on timeout.
Also `_scanCount` will only be cleared if there is a `_scanResult`.

See: espressif#8952

Author: TD-er

Diff for: libraries/WiFi/src/WiFiScan.cpp

@@ -160,9 +160,6 @@ int16_t WiFiScanClass::scanComplete() {
     return WiFiScanClass::_scanCount;
   }
 
-  if (WiFiGenericClass::getStatusBits() & WIFI_SCANNING_BIT) {
-    return WIFI_SCAN_RUNNING;
-  }
   // last one to avoid time affecting Async mode
   if (WiFiScanClass::_scanStarted
       && (millis() - WiFiScanClass::_scanStarted)
@@ -171,6 +168,10 @@ int16_t WiFiScanClass::scanComplete() {
     return WIFI_SCAN_FAILED;
   }
 
+  if (WiFiGenericClass::getStatusBits() & WIFI_SCANNING_BIT) {
+    return WIFI_SCAN_RUNNING;
+  }
+
   return WIFI_SCAN_FAILED;
 }
 
@@ -179,11 +180,12 @@ int16_t WiFiScanClass::scanComplete() {
  */
 void WiFiScanClass::scanDelete() {
   WiFiGenericClass::clearStatusBits(WIFI_SCAN_DONE_BIT);
+  WiFiGenericClass::clearStatusBits(WIFI_SCANNING_BIT);
   if (WiFiScanClass::_scanResult) {
     delete[] reinterpret_cast<wifi_ap_record_t *>(WiFiScanClass::_scanResult);
     WiFiScanClass::_scanResult = nullptr;
-    WiFiScanClass::_scanCount = 0;
   }
+  WiFiScanClass::_scanCount = 0;
 }
 
 /**