Fix compilation with GCC 8.2+ (#617)

* GCC 8.2 support

* Add GCC version check

* -Werror=class-memaccess fix in code

* Use assignment for Stats

modules/fakemeta/fm_tr2.cpp

@@ -1255,7 +1255,7 @@ static cell AMX_NATIVE_CALL create_tr2(AMX *amx, cell *params)
 		tr = g_FreeTRs.front();
 		g_FreeTRs.pop();
 	}
-	memset(tr, 0, sizeof(TraceResult));
+	memset(static_cast<void *>(tr), 0, sizeof(TraceResult));
 	return reinterpret_cast<cell>(tr);
 }