[PATCH] Use local SQLite amalgamation in preference to system SQLite

I assume it would be better to use the local SQLite amalgamation, if
present, in preference to any SQLite installed on the system, if the
user doesn't specify otherwise. Currently, if there's a usable version
on the system it ignores the local amalgamation file.

Patch attached. Notice that the current comments on those lines of code
indicate that it was intended to be the way I'm saying.

Any reason why not?

- Julian

------------------------------------------------------
http://subversion.tigris.org/ds/viewMessage.do?dsForumId=462&dsMessageId=1037837