glib-mkenums.in: fix @ENUMPREFIX@ with /*< underscore_name=... >*/

For enums defined with an underscore_name override, @ENUMPREFIX@
would include a trailing "_". Fix.

https://bugzilla.gnome.org/show_bug.cgi?id=661797

diff --git a/gobject/glib-mkenums.in b/gobject/glib-mkenums.in
index 6372245..af0304d 100755 (executable)
--- a/gobject/glib-mkenums.in
+++ b/gobject/glib-mkenums.in
@@ -379,7 +379,7 @@ while (<>) {
            $enumshort =~ s/^[A-Z][A-Z0-9]*_//;
 
            $enumname_prefix = $enumlong;
-           $enumname_prefix =~ s/$enumshort$//;
+           $enumname_prefix =~ s/_$enumshort$//;
        } else {
            # enumname is e.g. GMatchType
            $enspace = $enumname;