On mingw, use "%I64u" to printf/scanf 64-bit integers, instead of the usual GCC "%llu".  This prevents a bug when saving 64-bit int configuration values on mingw; the high-order 32 bits would get truncated.  If the value was then reloaded, disaster would occur. (Fixes bug 400 and maybe also bug 397.)  Backport candidate.


svn:r9691