Itseez/opencv — pull request #2882 by akarsakov (2014-06-20 11:48:50+00:00)
Title: OCL: pyrDown for 8UC1

**Description**
- used fma for sum calculating
- loading data using uchar4 for 8UC1

check_regression=*OCL*yrDown*
build_examples=OFF
test_modules=imgproc