[gtksourceview] cpphdr: fix mimetype

[Sébastien Wilmet <swilmet src gnome org>]

commit c185fa59700c50fafa634d03874d3b9ab3b361b5
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Thu Oct 1 18:21:57 2015 +0200

    cpphdr: fix mimetype
    
    https://bugzilla.gnome.org/show_bug.cgi?id=755933

 data/language-specs/cpphdr.lang |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/data/language-specs/cpphdr.lang b/data/language-specs/cpphdr.lang
index 350c4cd..f4944a6 100644
--- a/data/language-specs/cpphdr.lang
+++ b/data/language-specs/cpphdr.lang
@@ -24,7 +24,7 @@
 -->
 <language id="cpphdr" _name="C++ Header" version="2.0" _section="Source">
   <metadata>
-    <property name="mimetypes">text/x-chdr</property>
+    <property name="mimetypes">text/x-c++hdr</property>
     <property name="globs">*.hh;*.hp;*.hpp;*.h++</property>
     <property name="line-comment-start">//</property>
     <property name="block-comment-start">/*</property>