[libgxps] lib: Document explicit fall-through case in glyph parser

[Philip Withnall <pwithnall src gnome org>]

commit 54448854ac2b1415331dbf3ce50a15ecacfe2bca
Author: Philip Withnall <withnall endlessm com>
Date:   Tue Dec 20 19:36:01 2016 +0000

    lib: Document explicit fall-through case in glyph parser
    
    Make it clear that this is not an accidentally missing break statement.
    
    Coverity ID: 1391237
    
    https://bugzilla.gnome.org/show_bug.cgi?id=776323

 libgxps/gxps-glyphs.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/libgxps/gxps-glyphs.c b/libgxps/gxps-glyphs.c
index 0618720..d0c5154 100644
--- a/libgxps/gxps-glyphs.c
+++ b/libgxps/gxps-glyphs.c
@@ -366,6 +366,7 @@ glyphs_indices_parse (const char          *indices,
                         break;
                 case GI_TOKEN_EOF:
                         eof = TRUE;
+                        /* fall through */
                 case GI_TOKEN_SEMICOLON: {
                         cairo_text_extents_t extents;