lib583: fix compiler warning

Use CURLMcode for variable 'res' and cast to int where necessary
instead of the other way around. Other tests do the same.

This fixes the following clang warning:
lib583.c:68:15: warning: cast from function call of type 'CURLMcode' to
non-matching type 'int' [-Wbad-function-cast]

1 files changed, 4 insertions, 4 deletions

diff --git a/tests/libtest/lib583.c b/tests/libtest/lib583.c
index 5b11fab2b..f0a088b70 100644
--- a/tests/libtest/lib583.c
+++ b/tests/libtest/lib583.c
@@ -35,7 +35,7 @@ int test(char *URL)
   int stillRunning;
   CURLM *multiHandle = NULL;
   CURL *curl = NULL;
-  int res = 0;
+  CURLMcode res = CURLM_OK;
 
   global_init(CURL_GLOBAL_ALL);
 
@@ -65,10 +65,10 @@ int test(char *URL)
   fprintf(stderr, "curl_multi_perform() succeeded\n");
 
   fprintf(stderr, "curl_multi_remove_handle()...\n");
-  res = (int) curl_multi_remove_handle(multiHandle, curl);
+  res = curl_multi_remove_handle(multiHandle, curl);
   if(res)
     fprintf(stderr, "curl_multi_remove_handle() failed, "
-            "with code %d\n", res);
+            "with code %d\n", (int)res);
   else
     fprintf(stderr, "curl_multi_remove_handle() succeeded\n");
 
@@ -80,5 +80,5 @@ test_cleanup:
   curl_multi_cleanup(multiHandle);
   curl_global_cleanup();
 
-  return res;
+  return (int)res;
 }