Fix repeat.count = 0 case (#5364)

* Only play first action if count is non-zero

* Add test to  yaml

* Update test5.yaml

esphome/core/base_automation.h

@@ -249,7 +249,11 @@ template<typename... Ts> class RepeatAction : public Action<Ts...> {
   void play_complex(Ts... x) override {
     this->num_running_++;
     this->var_ = std::make_tuple(x...);
+    if (this->count_.value(x...) > 0) {
       this->then_.play(0, x...);
+    } else {
+      this->play_next_tuple_(this->var_);
+    }
   }
 
   void play(Ts... x) override { /* ignore - see play_complex */

tests/test5.yaml

@@ -563,6 +563,13 @@ script:
           then:
             - logger.log: looping!
 
+  - id: zero_repeat_test
+    then:
+      - repeat:
+          count: !lambda "return 0;"
+          then:
+            - logger.log: shouldn't see mee!
+
 switch:
   - platform: modbus_controller
     modbus_controller_id: modbus_controller_test