Do not allow fog start to be null
Try old method of creating a context
Fixed #1799 (linking issue) - use of VS only functions that were not
enclosed on #ifdef (not an issue with default link options, since the
functions using the VS only functions are not actually used in STK).
Merge branch 'master' of github.com:supertuxkart/stk-code
Update .gitignore file
Revert "No need to signal the shader the AMD_vertex_shader_layer is enabled"

This reverts commit 2e0bec57570c27a37630e98a721a79127ea6e7f5.
Do not undefine builtin macros.
Fixed crash in debug mode when command line option -N is used.
Allow command line options --kart and --track to select locked tracks.
This will allow reviewers to post screenshot of new tracks.
two redundant lines of code that may have caused a tiny memory leak
Merge pull request #1833 from smalltock/smallRedundancy00

two redundant lines of code that may have caused a tiny memory leak
Merge branch 'master' of https://github.com/supertuxkart/stk-code