Engine: Rewrite findTarget()

Author: adazem009

src/engine/internal/engine.cpp

@@ -854,13 +854,14 @@ Target *Engine::targetAt(int index) const
 
 int Engine::findTarget(const std::string &targetName) const
 {
-    int i = 0;
-    for (auto target : m_targets) {
-        if ((target->isStage() && targetName == "_stage_") || (!target->isStage() && target->name() == targetName))
-            return i;
-        i++;
-    }
-    return -1;
+    auto it = std::find_if(m_targets.begin(), m_targets.end(), [targetName](std::shared_ptr<Target> target) {
+        return ((target->isStage() && targetName == "_stage_") || (!target->isStage() && target->name() == targetName));
+    });
+
+    if (it == m_targets.end())
+        return -1;
+    else
+        return it - m_targets.begin();
 }
 
 void Engine::moveSpriteToFront(Sprite *sprite)