strerror: Preserve Windows error code in some functions

This is a follow-up to af02162 which removed (SET_)ERRNO macros. That
commit was an earlier draft that I committed by mistake, which was then
remedied by a5834e5 and e909de6, and now this commit. With this commit
there is now no difference between the current code and the changes that
were approved in the final draft.

Thanks-to: Max Dymond, Marcel Raad, Daniel Stenberg, Gisle Vanem
Ref: https://github.com/curl/curl/pull/1589

1 files changed, 1 insertions, 3 deletions

diff --git a/tests/libtest/lib591.c b/tests/libtest/lib591.c
index c04d3fbae..53ede3fcd 100644
--- a/tests/libtest/lib591.c
+++ b/tests/libtest/lib591.c
@@ -44,15 +44,13 @@ int test(char *URL)
   int msgs_left;
   CURLMsg *msg;
   FILE *upload = NULL;
-  int error;
 
   start_test_timing();
 
   upload = fopen(libtest_arg3, "rb");
   if(!upload) {
-    error = errno;
     fprintf(stderr, "fopen() failed with error: %d (%s)\n",
-            error, strerror(error));
+            errno, strerror(errno));
     fprintf(stderr, "Error opening file: (%s)\n", libtest_arg3);
     return TEST_ERR_FOPEN;
   }