common: Add a missing include guard

src/common/IPLocation/IPLocation.h

@@ -15,6 +15,9 @@
  * with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
+#ifndef IPLOCATION_H
+#define IPLOCATION_H
+
 #include "Define.h"
 #include <string>
 #include <vector>
@@ -46,3 +49,5 @@ class TC_COMMON_API IpLocationStore
 };
 
 #define sIPLocation IpLocationStore::Instance()
+
+#endif