move std function

libs/main/thread/pithreadpoolloop.cpp

@@ -136,7 +136,7 @@ PIThreadPoolLoop::~PIThreadPoolLoop() {
 
 
 void PIThreadPoolLoop::setFunction(std::function<void(int)> f) {
-	func = f;
+	func = std::move(f);
 }
 
 
@@ -163,6 +163,6 @@ void PIThreadPoolLoop::exec(int index_start, int index_count) {
 
 
 void PIThreadPoolLoop::exec(int index_start, int index_count, std::function<void(int)> f) {
-	setFunction(f);
+	setFunction(std::move(f));
 	exec(index_start, index_count);
 }