fix whitespace

Author: chinhsuanwu

modules/rgbd/samples/large_kinfu_dbow_demo.cpp

@@ -111,7 +111,7 @@ int main(int argc, char** argv)
 
     Ptr<DepthSource> ds;
     Ptr<RGBSource> rgb;
-    
+
     if (parser.has("depth"))
         ds = makePtr<DepthSource>(parser.get<String>("depth"));
     else

modules/rgbd/src/large_kinfu.cpp

@@ -139,7 +139,7 @@ class LargeKinfuImpl : public LargeKinfu
 
     int frameCounter;
     Affine3f pose;
-    
+
     Ptr<LoopClosureDetection> lcd;
 };