patch 8.2.3893: Vim9: many local variables are initialized with an instruction

Problem:    Vim9: many local variables are initialized with an instruction.
Solution:   Initialize local variables to zero to avoid the instructions.
diff --git a/src/version.c b/src/version.c
index bca7604..423ec6e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -750,6 +750,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3893,
+/**/
     3892,
 /**/
     3891,