FreeRDP/FreeRDP — pull request #741 by bmiklautz (2012-09-26 13:58:14+00:00)
Title: build: check libavcodec api version

If pkg-config is available libavcodec api version is checked and
cmake fails if the required version isn't available.

In case pkg-config isn't available a notification message with the
required version is printed.

This fixes/prevents #740.