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_scan.h b/utils/themeeditor/skin_scan.h
index 210f39c..682e32b 100644
--- a/utils/themeeditor/skin_scan.h
+++ b/utils/themeeditor/skin_scan.h
@@ -22,10 +22,20 @@
 #ifndef SCANNING_H
 #define SCANNING_H
 
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+
 /* Scanning functions */
 void skip_comment(char** document);
 void skip_whitespace(char** document);
 char* scan_string(char** document);
 int scan_int(char** document);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif // SCANNING_H