[gnome-builder/gnome-builder-3-28] xml-pack: don't dereference before base

[Christian Hergert <chergert src gnome org>]

commit 49d7d0936e2bc5858bebd61aed01f21a22697c4d
Author: Christian Hergert <chergert redhat com>
Date:   Mon Jun 11 21:08:58 2018 -0700

    xml-pack: don't dereference before base

 src/plugins/xml-pack/ide-xml-sax.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/plugins/xml-pack/ide-xml-sax.c b/src/plugins/xml-pack/ide-xml-sax.c
index 4cb6eedf0..c2841655f 100644
--- a/src/plugins/xml-pack/ide-xml-sax.c
+++ b/src/plugins/xml-pack/ide-xml-sax.c
@@ -251,7 +251,7 @@ get_tag_location (IdeXmlSax    *self,
                   if (ch == '\n')
                     --end_line_number;
 
-                  if (!g_unichar_isspace(ch))
+                  if (!g_unichar_isspace (ch) || current == base)
                     break;
 
                   current = g_utf8_prev_char (current);