Core/Misc: Fix assertion triggered

Change an assertion added in 6dcd8c8545a65a7bfbd0daaa16f650d8c3a90262 with a NULL check, properly handling the case of a NULL parameter.
Fixes #11771
DB/Creature: Fix Living Storm coords

By Magnifikator closes #11785
Buildsystem: Changed required CMake version to 2.8.9 and removed a check for version we no longer support in msvc settings
Merge remote-tracking branch 'upstream/master'