fix bug if git_root is "0"

diff --git a/IkiWiki/Plugin/git.pm b/IkiWiki/Plugin/git.pm
index 457975d953225f7d916282086008014aeff45e67..b6ed6142839b7a4cfdefbbf4d3fb959a75afaf8b 100644 (file)
--- a/IkiWiki/Plugin/git.pm
+++ b/IkiWiki/Plugin/git.pm
@@ -729,7 +729,7 @@ sub git_find_root {
     # Determine if it is in a subdirectory by examining the srcdir,
     # and its parents, looking for the .git directory.
 
-    return $git_root if $git_root;
+    return $git_root if defined $git_root;
 
     my $subdir="";
     my $dir=$config{srcdir};