Update all header guards.

[tinc] / src / mingw / common.h

diff --git a/src/mingw/common.h b/src/mingw/common.h
index 6e5e75c..f16744b 100644 (file)
--- a/src/mingw/common.h
+++ b/src/mingw/common.h
@@ -1,3 +1,6 @@
+#ifndef TINC_MINGW_COMMON_H
+#define TINC_MINGW_COMMON_H
+
 /*
  *  TAP-Win32 -- A kernel driver to provide virtual tap device functionality
  *               on Windows.  Originally derived from the CIPE-Win32
@@ -73,3 +76,5 @@
 //=========================================================
 
 #define TAP_COMPONENT_ID "tap0801"
+
+#endif