Log Message:
Update to 0.98.12, from Leonard Schmidt in PR 28327.
Changes since previous version:
        Fixed a bug that was causing 2xscale/3xscale to be broken
        when clipping the leftmost and rightmost 8 columns.

        Added an iNES header correction entry for JustBreed.

        Modified the MMC5 "ELROM" board emulation to not emulate WRAM.

        Corrected various pieces of code that were causing compiler warnings.

        When the PPU is in a "dead" state after starting up, the graphics
        buffer is now cleared.  Previously, particularly in the Windows port, when
        a game was closed, and a new game was loaded, the last image from
        the previous game would be displayed for a short time.

        Removed some debugging code that shouldn't have been enabled in 0.98.11.