change include guard to fulfill our coding style standard. :-)

src/wrapper.hh

@@ -1,8 +1,8 @@
 // This file is under GNU General Public License 3.0
 // see LICENSE.txt
 
-#ifndef PEP_DATATYPES_WRAPPER_HH
-#define PEP_DATATYPES_WRAPPER_HH
+#ifndef LIBPEPDATATYPES_WRAPPER_HH
+#define LIBPEPDATATYPES_WRAPPER_HH
 
 namespace pEp
 {
@@ -82,4 +82,4 @@ private:
 
 } // end of namespace pEp
 
-#endif // PEP_DATATYPES_WRAPPER_HH
+#endif // LIBPEPDATATYPES_WRAPPER_HH