[geany/geany] fdd553: Use g_return_val_if_fail for some invalid NULL arg...

[Nick Treleaven]

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

  Commit: fdd5537cc0fcdb0e0ce1a5f58d2e08647436b847
      https://github.com/geany/geany/commit/fdd5537cc0fcdb0e0ce1a5f58d2e08647436b847
  Author: Nick Treleaven <nick.treleaven at btinternet.com>
  Date:   2011-10-31 (Mon, 31 Oct 2011)

  Changed paths:
    M src/document.c
  M src/utils.c

  Log Message:
  -----------
  Use g_return_val_if_fail for some invalid NULL arguments