Build 3717

------------------------------------------------------------------------
r3717 | helixhorned | 2013-04-29 12:24:19 -0700 (Mon, 29 Apr 2013) | 6 lines

Fix two bugs found by Clang's undefined behavior sanitizer.

- Return early from drawsprite_classic() if tspr->owner if oob.
  Commonize that check between renderers into bad_tspr().
- Make the BIT() macro a left-shift of the *unsigned* number 1,
  preventing expansion to (1<<31).
------------------------------------------------------------------------
r3716 | helixhorned | 2013-04-29 12:24:15 -0700 (Mon, 29 Apr 2013) | 7 lines

Fix debugging builds with Clang 3.2 and up.

In those Clang versions, -fcatch-undefined-behavior was replaced by
-fsanitize=<what>.  For Clang 3.2, we enable the address sanitizer
and for 3.3 also the miscellaneous undefined behavior one.
Currently, there's no version auto-detection from the Makefiles, it's
set to 3.3 and the others are commented out.
------------------------------------------------------------------------
r3715 | helixhorned | 2013-04-29 12:24:12 -0700 (Mon, 29 Apr 2013) | 4 lines

Generalize ZRANGE and ANGRANGE to accept any nonnegative number.

Numbers 0 and 1 mean 'no spread', but the latter does one krand() call.
Negative numbers are reserved for potential future use.
------------------------------------------------------------------------