#193 Crash when trying to open About dialog

[Alexey Dokuchaev]

Version 1.2.92 crashes when trying to open About dialog window, because of the missing errno reset prior to calling strtol(3) in parse_property() function (moo/mooutils/mooglade.c). The bug is still present in the latest Bitbucket sources. Simple patch to fix:

     {
+        errno = 0;
         long val = strtol (value, NULL, 0);