FIX: check for valid pointers in exported functions

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6438 8aca7d54-2c30-db11-9de9-000461428c89
FIX crash when deleting tunnel tile

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6439 8aca7d54-2c30-db11-9de9-000461428c89
FIX: crash when building powertunnel

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6440 8aca7d54-2c30-db11-9de9-000461428c89
FIX: maintenance when removing tunnel tiles

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6441 8aca7d54-2c30-db11-9de9-000461428c89
CHG: Added a new setting to simuconf.tab, background_color. 

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6442 8aca7d54-2c30-db11-9de9-000461428c89
Thai character in cyr.bdf

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6443 8aca7d54-2c30-db11-9de9-000461428c89
Add missing files to project

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6444 8aca7d54-2c30-db11-9de9-000461428c89
force world redraw on window resize.

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6445 8aca7d54-2c30-db11-9de9-000461428c89
FIX: map borders on DOUBLE_GROUNDS

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6446 8aca7d54-2c30-db11-9de9-000461428c89
missing newlines

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6447 8aca7d54-2c30-db11-9de9-000461428c89
FIX: coordinates to jump to places on the map were not rotated correctly

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6448 8aca7d54-2c30-db11-9de9-000461428c89
Display of thai font. But cry.bdf is anyway with wrong offsets

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6449 8aca7d54-2c30-db11-9de9-000461428c89
FIX stupid pointer arithmetic

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6450 8aca7d54-2c30-db11-9de9-000461428c89
FIX: set background dirty when moving and resizing windows

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6451 8aca7d54-2c30-db11-9de9-000461428c89
FIX segfaults on pak selection related to background_dirty()

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6452 8aca7d54-2c30-db11-9de9-000461428c89
corrected spaces->tabs on my last update on grund.cc

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6453 8aca7d54-2c30-db11-9de9-000461428c89
CODE: MinGW static link standard libraries for makeobj

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6454 8aca7d54-2c30-db11-9de9-000461428c89
CHG: SDL backend USE_HW now runtime option -use_hw. ADD: use of SDL_Rects for more performance. ADD: multithreaded screen update ala GDI

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6455 8aca7d54-2c30-db11-9de9-000461428c89
FIX: Tooltips force the check for backbround redraw.

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6456 8aca7d54-2c30-db11-9de9-000461428c89
spaces again... sorry

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6457 8aca7d54-2c30-db11-9de9-000461428c89