patch 8.1.1752: resizing hashtable is inefficient

Problem:    Resizing hashtable is inefficient.
Solution:   Avoid resizing when the final size is predictable.
diff --git a/src/version.c b/src/version.c
index 5104f6a..25bfd16 100644
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1752,
+/**/
     1751,
 /**/
     1750,