Patch #14:

This patch reduces the compiler warning count on Win64 by an additional
700, as reported by VS2015.

Fix lots of C4267 "type cast pointer truncation" warnings from
DBUG_PRINT statements by using %p to print pointer values
rather than implicit casting from pointer to 32 bit int.

Also fix a few C4244/C4267 64->32 bit implicit conversion
warnings in header files.