patch 9.0.1633: duplicate code for converting float to string

Problem:    Duplicate code for converting float to string.
Solution:   Use tv_get_string(). (closes #12521)
diff --git a/src/version.c b/src/version.c
index ded2d6b..7a1c730 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1633,
+/**/
     1632,
 /**/
     1631,