Fixed few warnings

android/service/doc/LoaderCallbackInterface.rst

@@ -11,12 +11,12 @@ Loader Callback Interface
     Interface for callback object in case of asynchronous initialization of OpenCV
 
 void onManagerConnected()
-------------------------
+-------------------------
 
 .. method:: void onManagerConnected(int status)
 
     Callback method that is called after OpenCV library initialization
- 
+
     :param status: Status of initialization. See Initialization status constants
 
 void onPackageInstall()

modules/contrib/src/facerec.cpp

@@ -584,7 +584,7 @@ static Mat histc(InputArray _src, int minVal, int maxVal, bool normed)
 
 
 static Mat spatial_histogram(InputArray _src, int numPatterns,
-                             int grid_x, int grid_y, bool normed)
+                             int grid_x, int grid_y, bool /*normed*/)
 {
     Mat src = _src.getMat();
     // calculate LBP patch size