fix adv goon snipe to not make clicking sound, when temporary out of ammo
[ci skip]
Fix reading of score and radar fade-out from buildable attributes files.
Fix PARSE macro so that it has single-statement semantics.
Include headers rather than declare BG_Alloc.
Some white space & indentation fixes.
Revert "Fix PARSE macro so that it has single-statement semantics."

Breaks things, but shouldn't…

This reverts commit d03761e51d4e11b6f7beb51a05d2ebe70f277ded.
Have the attr/model parser report which file when there's a problem.
Merge remote-tracking branch 'upstream/master' into bots+entities