Theme Editor: Added extern C declarations to header files

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26433 a1c6a512-1295-4272-9138-f99709370657
diff --git a/utils/themeeditor/skin_parser.h b/utils/themeeditor/skin_parser.h
index 7b3ab13..201e06c 100644
--- a/utils/themeeditor/skin_parser.h
+++ b/utils/themeeditor/skin_parser.h
@@ -22,6 +22,12 @@
 #ifndef GENERIC_PARSER_H
 #define GENERIC_PARSER_H
 
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+
 #define SKIN_MAX_MEMORY 1048576
 
 /********************************************************************
@@ -124,4 +130,8 @@
 
 void skin_free_tree(struct skin_element* root);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* GENERIC_PARSER_H */