small debug changed

src/SDK_Debug.c

@@ -78,6 +78,7 @@ void dwr(int level, const char *fmt, ... )
     }
     if(debug_logfile) {
       FILE *file = fopen(debug_logfile,"a");
+      fprintf(file, "%s [tid=%7d] ", timestring, tid);
       vfprintf(file, fmt, ap);
       fclose(file);
       va_end(ap);

src/SDK_Intercept.c

@@ -527,7 +527,7 @@ char *api_netpath;
         if(!check_intercept_enabled_for_thread()) { 
             return realclose(fd);
         }
-        zt_close(fd);
+        return zt_close(fd);
     }
 
     // ------------------------------------------------------------------------------
@@ -550,7 +550,6 @@ char *api_netpath;
         return zt_getsockname(sockfd, addr, addrlen);
     }
 
-
     // ------------------------------------------------------------------------------
     // ------------------------------------ syscall() -------------------------------
     // ------------------------------------------------------------------------------