fix(timer): Fix memory leak in espp::HighResolutionTimer when calling start repeatedly (#226)

Author: finger563

components/timer/include/high_resolution_timer.hpp

@@ -49,12 +49,7 @@ class HighResolutionTimer : public espp::BaseComponent {
   }
 
   /// Destructor
-  ~HighResolutionTimer() {
-    stop();
-    if (timer_handle_) {
-      esp_timer_delete(timer_handle_);
-    }
-  }
+  ~HighResolutionTimer() { stop(); }
 
   /// Start the timer
   /// @param period_us Period of the timer in microseconds, or timeout if
@@ -111,6 +106,10 @@ class HighResolutionTimer : public espp::BaseComponent {
     if (is_running()) {
       esp_timer_stop(timer_handle_);
     }
+    if (timer_handle_) {
+      esp_timer_delete(timer_handle_);
+      timer_handle_ = nullptr;
+    }
   }
 
   /// Check if the timer is running