Building gtk30 without debug makes the compilation to be built with -DG_DISABLE_CHECKS. That
makes g_return_if_fail and g_return_val_if_fail not to be evaluated. Evolution fails to
start because of that.

[1] https://developer.gnome.org/glib/2.37/glib-Warnings-and-Assertions.html#g-return-if-fail
[2] https://bugzilla.gnome.org/show_bug.cgi?id=727687


git-svn-id: svn://creme-brulee.marcuscom.com/ports-experimental/trunk@19455 df743ca5-7f9a-e211-a948-0013205c9059