Item9232: in very rare circumstances, configure may attempt to expand…

… an undef

git-svn-id: http://svn.foswiki.org/trunk@8052 0b4bb1d4-4e5a-0410-9cc4-b2b747904278

core/lib/Foswiki/Configure/Load.pm

@@ -164,7 +164,7 @@ sub expandValue {
 # expressions.
 #    } elsif (ref($_[0])) {
 #        Carp::confess("Can't handle a ".ref($_[0]));
-    } else {
+    } elsif (defined($_[0])) {
         $_[0] =~ s/(\$Foswiki::cfg{[[A-Za-z0-9{}]+})/_handleExpand($1)/ge;
     }
 }