Fix syncing wiimotes on OS X.

IOdarwin.mm was assuming that scanning was complete when the run loop
was stopped (which the scan callback does), but somebody else was
stopping the run loop first, causing the scan to be aborted.  Wait until
the scan is actually complete.

Source/Core/Core/Src/HW/WiimoteReal/IOdarwin.mm

@@ -7,6 +7,7 @@
 @interface SearchBT: NSObject {
 @public
 	unsigned int maxDevices;
+	bool done;
 }
 @end
 
@@ -15,6 +16,7 @@
 	error: (IOReturn) error
 	aborted: (BOOL) aborted
 {
+	done = true;
 	CFRunLoopStop(CFRunLoopGetCurrent());
 }
 
@@ -144,9 +146,12 @@ void WiimoteScanner::FindWiimotes(std::vector<Wiimote*> & found_wiimotes, Wiimot
 	else
 		ERROR_LOG(WIIMOTE, "Unable to do bluetooth discovery");
 
-	CFRunLoopRun();
+	do
+	{
+		CFRunLoopRun();
+	}
+	while(!sbt->done);
 
-	[bti stop];
 	int found_devices = [[bti foundDevices] count];
 
 	if (found_devices)