patch 8.2.4878: valgrind warning for using uninitialized variable

Problem:    Valgrind warning for using uninitialized variable.
Solution:   Initialize the type of newtv.
diff --git a/src/version.c b/src/version.c
index e3aa288..30f420b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4878,
+/**/
     4877,
 /**/
     4876,