patch 8.1.1941: getftype() test fails on Mac

Problem:    getftype() test fails on Mac.
Solution:   Skip /dev/fd/.
diff --git a/src/version.c b/src/version.c
index f0ccfe3..e6f7d14 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1941,
+/**/
     1940,
 /**/
     1939,