Bugfix: Memory leak in deletion of er_stack nodes of ERFilter.
Optimize OpenCL version of sepFilter2D
Change local size
Merge pull request #2856 from sanchom:master
fixed cv::warpPerspective
Merge pull request #2928 from ilya-lavrenov:tapi_warp_fix
fixed warnings
ocl: add try-catch for OpenCL device getter
Merge pull request #2897 from vbystricky:oclopt_sepFilter2D
Merge pull request #2931 from alalek:mac_fix_master
use vectors for devices of all vendors
Merge pull request #2932 from ilya-lavrenov:tapi_other_vendors