changed int -> size_t when accessing std::vector
Let clAmdBlas library initialize once during program lifetime.
Bugfix 3115: Added not to documentation for python version for
facerecognizer interface + white + whitespaces remove
Modify according to @alalek.
Fix a crash of ocl program if clAmdBlas is not linked.
Merge pull request #1383 from pengx17:2.4_clblas
Merge pull request #1382 from nghiaho12:cascade_classifier
Merge pull request #1378 from StevenPuttemans:bugfix_3115