[OpenSIPS-Devel] [OpenSIPS/opensips] a42075: Fix a string concatenation operator bug

[Liviu Chircu]

  Branch: refs/heads/master
  Home:   https://github.com/OpenSIPS/opensips
  Commit: a420752f436a1f952c255df8d5dbe9ea59b0d653
      https://github.com/OpenSIPS/opensips/commit/a420752f436a1f952c255df8d5dbe9ea59b0d653
  Author: Liviu Chircu <liviu at opensips.org>
  Date:   2016-05-20 (Fri, 20 May 2016)

  Changed paths:
    M route.c

  Log Message:
  -----------
  Fix a string concatenation operator bug

This patch fixes an issue with string concatenation where any NULL
operand would cause all operands to its left to be ignored when
computing the result of the expression.

Reported by Ovidiu Sas
Closes #870