[DImgConv] Directories in output path are not created in recursive mode

[biwa]

When having a nested directory structure in the source directory and using the --recursive switch, the nested directory structure is not created in the output path.

Let's take a directory structure like this:

.\source\mymonster\mymoa0.png
.\destination\

and run DImgConv like this:

dimgconv source --output destination --recursive --palette doom2.wad

it will produce this error:

ERROR: I/O error on WAD write: destination\mymonster\mymoa0.lmp (The system cannot find the specified path)

if the .\destination\mymonster\ directory is created manually the command works as expected (and if used with DoomMake the files from the nested destination directory are put in the resulting WAD correctly).

[MTrop]

Fixed in commit d047e0887c96fc143bfe516378cfa4fa38ff1fb4