Log Message:
Update from 0.62.1-rc3 to 0.62.1-rc4, using the patch file since there is
no tar file yet.

+       - Fixed problems in memory.c that could lead to crashes and default.cfg
+         corruption.  (smf)
+       - Fixed a bunch of ANSI/ISO warnings reported by Stefano Priore.
+       - Fixed a crash in the MESS Atari 800 driver.
+       - Aspect and mode switches are now available for the Xv driver even if
+         DGA isn't enabled.