DirectShow: Add WhiteBalancePreset and ColorTemperature for the camera

Change-Id: I9a646418d6177338735e1eb38967fd092e21e0cf
Reviewed-by: Yoann Lopes <yoann.lopes@theqtcompany.com>

src/plugins/directshow/camera/dscamerasession.h

@@ -130,6 +130,9 @@ private:
             : minimumValue(0)
             , maximumValue(0)
             , defaultValue(0)
+            , currentValue(0)
+            , capsFlags(0)
+            , hasBeenExplicitlySet(false)
             , videoProcAmpProperty(VideoProcAmp_Brightness)
         {
         }
@@ -137,6 +140,9 @@ private:
         LONG minimumValue;
         LONG maximumValue;
         LONG defaultValue;
+        LONG currentValue;
+        LONG capsFlags;
+        bool hasBeenExplicitlySet;
         VideoProcAmpProperty videoProcAmpProperty;
     };