updated for compilation with VS2015 (#739)

include/n2n_define.h

@@ -179,6 +179,14 @@ enum skip_add{SN_ADD = 0, SN_ADD_SKIP = 1, SN_ADD_ADDED = 2};
 #define N2N_IFNAMSIZ               16 /* 15 chars * NULL */
 #endif
 
+#ifdef _MSC_VER
+#define N2N_THREAD_RETURN_DATATYPE       DWORD WINAPI
+#define N2N_THREAD_PARAMETER_DATATYPE    LPVOID
+#else
+#define N2N_THREAD_RETURN_DATATYPE        void*
+#define N2N_THREAD_PARAMETER_DATATYPE     void*
+#endif
+
 #define SN_SELECTION_CRITERION_DATA_TYPE    uint32_t
 #define SN_SELECTION_CRITERION_BUF_SIZE     16
 

src/n2n.c

@@ -313,7 +313,7 @@ int supernode2sock (n2n_sock_t *sn, const n2n_sn_name_t addrIn) {
 }
 
 
-void *resolve_thread (void *p) {
+N2N_THREAD_RETURN_DATATYPE resolve_thread(N2N_THREAD_PARAMETER_DATATYPE p) {
 
 #ifdef HAVE_PTHREAD
     n2n_resolve_parameter_t *param = (n2n_resolve_parameter_t*)p;