Merge pull request #721 from jet47:tvl1-bug-fix
contours with zero area rejected

reject contours with zero area by using the "continue" statement to be in sync with the condition checking style used in the whole file
fixed misprint in MatOp::augAssignXor
removed unnecessary tmp variable (convertTo can work in-place)
fixed misprint in icvCreateIsometricImage
fixed misprint in imgwarp.cpp
removed duplication
fixed potential dereference of null pointer
fixed incorrect sizeof() expression in CvCaptureCAM_VFW::open
fixed incorrect sizeof() expression in CvCalibFilter::SetCameraCount
fixed mind/maxd search in CvFuzzyMeanShiftTracker::SearchWindow::initDepthValues
fixed condition in KeyPointsFilter::retainBest
fixed inconsistent  new/delete operators
CMakeLists.txt for Android native activity added.
fixed gpu module compilation under windows
Merge pull request #725 from taka-no-me:fix_array_create
Merge pull request #726 from jet47:fix-pvs-studio-warnings
Merge pull request #727 from asmorkalov:android_na_cmake
Merge pull request #729 from jet47:fix-gpu-windows-build
Merge pull request #720 from taka-no-me:drop_sort