Hang when using space bar/ESC to show SHR artwork and demos

[frankmilliron]

When exiting back to search mode from either a SHR slideshow or demo, TR sometimes hangs with a blank screen. Taking a look at $BFD0 shows TITLE.HGR/(FILENAME) as the file to load. Disk shows continuous access, like it is hanging on a bad filename or bad file attributes. Perhaps the path is being set incorrectly before returning control to the dispatcher? Can be reproduced by hitting ESC during a SHR fade, or by keypress when exiting certain demos. Does not seem to effect attract mode when running continuously. Seems to effect both //gs and ][ hardware.

[frankmilliron]

Return from Evolution SHR slide show works. Return from Eliminator SHR slide show does not.