Default ctor now calls private one

Author: mathieucarbou

src/ESPAsyncWebServer.h

@@ -776,7 +776,7 @@ class AsyncURIMatcher {
   static constexpr uint16_t CaseInsensitive = (1 << 0);
 
   // public constructors
-  AsyncURIMatcher() : _flags(intptr_t(Type::None)) {}
+  AsyncURIMatcher() : AsyncURIMatcher({}, Type::None, None) {}
   AsyncURIMatcher(String uri, uint16_t modifiers = None) : AsyncURIMatcher(std::move(uri), Type::Auto, modifiers) {}
   AsyncURIMatcher(const char *uri, uint16_t modifiers = None) : AsyncURIMatcher(String(uri), Type::Auto, modifiers) {}