Fixed the position of the drag image when dragging listboxes. Minor fix for mac graphics contexts, and win32 webcam latency adjustment.

src/native/windows/juce_win32_CameraDevice.cpp

@@ -191,6 +191,21 @@ public:
         {
             firstRecordedTime = Time::getCurrentTime();
             recordNextFrameTime = false;
+
+            ComSmartPtr <IPin> pin;
+            if (getPin (filter, PINDIR_OUTPUT, &pin))
+            {
+                ComSmartPtr <IAMPushSource> pushSource;
+                hr = pin->QueryInterface (IID_IAMPushSource, (void**) &pushSource);
+
+                if (pushSource != 0)
+                {
+                    REFERENCE_TIME latency = 0;
+                    hr = ps->GetLatency (&latency);
+
+                    firstRecordedTime -= RelativeTime ((double) latency);
+                }
+            }
         }
 
         imageSwapLock.enter();