Also fixes the range on the test, 0x19 plus 1 equals 0x1a, and
0x003c0000 should've been 0x004c0000.

Slightly improves readability.

Also removes now redundant setting of vidmem flag on rendertargets, prevents 
adding vidmem flag when sysmem flag is present. Fixes missing textures in Forsaken.

comctl32: statusbar: Rename NtfUnicode to bUnicode to make is more consistent with other controls, use NF_REQUERY in WM_CREATE.

comctl32: statusbar: Window is always Unicode, CCM_SETUNICODEFORMAT should change the notify format.

This patch enables texture filtering for textures using the A4R4G4B4
format, I can see no reason why it shouldn't be filtered (especially
considering X4R4G4B4 has it).

The regression was caused by destroying the caret when it didn't need to
be shown in the richedit control, but this affected other controls.