-Fix a bug calculating the u & v coordinates for the remaining pixels in a span when drawing the span using SSE2 intrinsics.

git-svn-id: http://odamex.net/svn/root/branches/texmanager@4351 b0bcef46-2027-0410-bd56-ab726e9a1d04
-Allocate all Textures with the PU_STATIC tag now. Since the address of each Texture pointer is stored in a OHashTable, the address can change due to rehashing and the Texture pointer won't get updated a PU_CACHE Texture is thrown out of memory.
-Add a function R_LoadTexture to ease the repetitive sequence of TextureManager::getHandle and TextureManager::getTexture.
-Fix a valgrind complaint in M_OptInit.

git-svn-id: http://odamex.net/svn/root/branches/texmanager@4353 b0bcef46-2027-0410-bd56-ab726e9a1d04
-Fix fuzz column rendering.
-Use branching to test for masking in the column drawers.

git-svn-id: http://odamex.net/svn/root/branches/texmanager@4354 b0bcef46-2027-0410-bd56-ab726e9a1d04