patch 7.4.2192
Problem:    Generating prototypes with Cygwin doesn't work well.
Solution:   Change #ifdefs. (Ken Takata)
diff --git a/src/version.c b/src/version.c
index 8735b64..c775c37 100644
--- a/src/version.c
+++ b/src/version.c
@@ -764,6 +764,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2192,
+/**/
     2191,
 /**/
     2190,