[geany/geany] f67ed6: Fix potential NULL dereference

[Lex Trotman]

  Branch: refs/heads/master
  Home:   https://github.com/geany/geany

  Commit: f67ed6b63670d88dead6b00b7aec340e9d61a7ed
      https://github.com/geany/geany/commit/f67ed6b63670d88dead6b00b7aec340e9d61a7ed
  Author: Lex Trotman <elextr at gmail.com>
  Date:   2011-11-09 (Wed, 09 Nov 2011)

  Changed paths:
    M src/build.c

  Log Message:
  -----------
  Fix potential NULL dereference

Found by codebrainz using clang static analyser.