WME3D: Alpha Polaris - crash when cycling through available shadow types

[lolbot-iichan]

This is not required to complete the game, but may bring similar bugs in other games.

TESTCASE:

1. Start Alpha Polaris
2. Begin first day, click through intro until you gain control over character
3. Press Ctrl+F3 result

EXPECTED RESULT: Game secret combination is used to cycle through various shadow types

ACTUAL RESULT:
`
Thread 1 received signal SIGSEGV, Segmentation fault.
0x000000014030a492 in Wintermute::BaseSurfaceOpenGL3D::setTexture (

this=0xbaadf00dbaadf00d)
at engines/wintermute/base/gfx/opengl/base_surface_opengl3d.cpp:294

294 prepareToDraw();
(gdb) bt
#0 0x000000014030a492 in Wintermute::BaseSurfaceOpenGL3D::setTexture (

this=0xbaadf00dbaadf00d)
at engines/wintermute/base/gfx/opengl/base_surface_opengl3d.cpp:294

#1 0x00000001402eddf3 in Wintermute::BaseRenderOpenGL3D::displayShadow (

this=0x5a314a0, object=0x54ae8650, lightPos=..., lightPosRelative=true)
at engines/wintermute/base/gfx/opengl/base_render_opengl3d.cpp:214

#2 0x0000000140232adb in Wintermute::AdActor3DX::display (this=0x54ae8650)

at engines/wintermute/ad/ad_actor_3dx.cpp:385

#3 0x000000014026fd95 in Wintermute::AdScene::displayRegionContent (

this=0x59465120, region=0x0, display3DOnly=false)
at engines/wintermute/ad/ad_scene.cpp:1379

#4 0x000000014026f570 in Wintermute::AdScene::traverseNodes (

this=0x59465120, doUpdate=false)
at engines/wintermute/ad/ad_scene.cpp:1231

#5 0x000000014026f6b2 in Wintermute::AdScene::display (this=0x59465120)

at engines/wintermute/ad/ad_scene.cpp:1266

#6 0x000000014025939d in Wintermute::AdGame::displayContent (

this=0x127cb5b0, doUpdate=true, displayAll=false)
at engines/wintermute/ad/ad_game.cpp:2126

#7 0x000000014022e7e9 in Wintermute::WintermuteEngine::messageLoop (

this=0x3179a60) at engines/wintermute/wintermute.cpp:314

#8 0x000000014022deba in Wintermute::WintermuteEngine::run (this=0x3179a60)

at engines/wintermute/wintermute.cpp:140

#9 0x000000014002b9ff in runGame (plugin=0x2dc94d0, enginePlugin=0x2dc4ca0,

system=..., debugLevels=...) at base/main.cpp:309

#10 0x000000014002d0a7 in scummvm_main (argc=1, argv=0x2722d30)

at base/main.cpp:608

#11 0x0000000140029139 in SDL_main (argc=1, argv=0x2722d30)

at backends/platform/sdl/win32/win32-main.cpp:71

#12 0x0000000140029077 in WinMain ()

at backends/platform/sdl/win32/win32-main.cpp:54

#13 0x00000001407b19e2 in main (flags=<optimized out>,

cmdline=<optimized out>, inst=<optimized out>)

`