revert changes

Author: zdohnal

cups/tls-gnutls.c

@@ -1613,9 +1613,9 @@ _httpTLSRead(http_t *http,		// I - Connection to server
 
   result = gnutls_record_recv(http->tls, buf, (size_t)len);
 
-  // Convert GNU TLS error to errno value...
   if (result < 0)
   {
+    // Convert GNU TLS error to errno value...
     switch (result)
     {
       case GNUTLS_E_INTERRUPTED :
@@ -1644,6 +1644,8 @@ _httpTLSRead(http_t *http,		// I - Connection to server
 	  errno = EPIPE;
 	  break;
     }
+
+    result = -1;
   }
 
   return ((int)result);
@@ -2051,6 +2053,8 @@ _httpTLSWrite(http_t     *http,		// I - Connection to server
 	  errno = EPIPE;
 	  break;
     }
+
+    result = -1;
   }
 
   DEBUG_printf("5_httpTLSWrite: Returning %d.", (int)result);