scala/scala — pull request #3832 by jrudolph (2014-06-25 11:41:31+00:00)
Title: SI-8657 don't miss tailrec defs in more positions

1) First operand of boolean expression using `&&` or `||`. Second operands of those boolean exprs were already treated specially here but handling for first operands was missing.
2) Condition of `If`. Also added a test for guards.