Feature based stitching's wave correction bugfix.
Feature based stitching's wave correction bugfix.

When we have similar matrices in input, then algorithm returns matrices
with NaN values.

opencv/opencv,apavlenko/opencv,apavlenko/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,apavlenko/opencv,opencv/opencv,opencv/opencv,apavlenko/opencv,apavlenko/opencv,apavlenko/opencv