Fixed Android build of new videostab module

modules/videostab/include/opencv2/videostab/fast_marching.hpp

@@ -72,7 +72,7 @@ private:
         float dist;
         int x, y;
 
-        DXY() {}
+        DXY() : dist(0), x(0), y(0) {}
         DXY(float dist, int x, int y) : dist(dist), x(x), y(y) {}
         bool operator <(const DXY &dxy) const { return dist < dxy.dist; }
     };

modules/videostab/include/opencv2/videostab/optical_flow.hpp

@@ -44,7 +44,11 @@
 #define __OPENCV_VIDEOSTAB_OPTICAL_FLOW_HPP__
 
 #include "opencv2/core/core.hpp"
-#include "opencv2/gpu/gpu.hpp"
+#include "opencv2/opencv_modules.hpp"
+
+#if HAVE_OPENCV_GPU
+#  include "opencv2/gpu/gpu.hpp"
+#endif
 
 namespace cv
 {
@@ -94,6 +98,7 @@ public:
             OutputArray status, OutputArray errors);
 };
 
+#if HAVE_OPENCV_GPU
 class DensePyrLkOptFlowEstimatorGpu
         : public PyrLkOptFlowEstimatorBase, public IDenseOptFlowEstimator
 {
@@ -107,6 +112,7 @@ private:
     gpu::PyrLKOpticalFlow optFlowEstimator_;
     gpu::GpuMat frame0_, frame1_, flowX_, flowY_, errors_;
 };
+#endif
 
 } // namespace videostab
 } // namespace cv