glib: use C90-style comments in public headers
diff --git a/glib/poppler-media.h b/glib/poppler-media.h
index f324e1b..292d386 100644
--- a/glib/poppler-media.h
+++ b/glib/poppler-media.h
@@ -29,7 +29,7 @@
#define POPPLER_MEDIA(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), POPPLER_TYPE_MEDIA, PopplerMedia))
#define POPPLER_IS_MEDIA(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), POPPLER_TYPE_MEDIA))
-// FIXME: this should be generic (PopplerSaveToCallbackFunc)
+/* FIXME: this should be generic (PopplerSaveToCallbackFunc) */
/**
* PopplerMediaSaveFunc: