eliminate crash in ipp-accelerated norm and mean functions (thanks to Matt Curfman and Aaron Kunze for the patch)
TAPI: fix OpenCL warpers and test
TAPI: fix perf test for warpers
Fixed typo with indexes in getGradient(x/y) functions.
ported 2.4 perf tests for matchTemplate
Merge pull request #2383 from ilya-lavrenov:perf_match_template
Merge pull request #2377 from alalek:tapi_warpers_perf_test
Merge pull request #2375 from akarsakov:fix_getGradient
fixed hint type declaration
Merge pull request #2266 from vpisarev:ipp_norm_fix