updated for version 7.4.272
Problem:    Using just "$" does not cause an error message.
Solution:   Check for empty environment variable name. (Christian Brabandt)
diff --git a/src/version.c b/src/version.c
index 9299257..06b9494 100644
--- a/src/version.c
+++ b/src/version.c
@@ -735,6 +735,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    272,
+/**/
     271,
 /**/
     270,