patch 9.0.0259: crash with mouse click when not initialized

Problem:    Crash with mouse click when not initialized.
Solution:   Check TabPageIdxs[] is not NULL.
diff --git a/src/version.c b/src/version.c
index 474cbcb..b1943bb 100644
--- a/src/version.c
+++ b/src/version.c
@@ -732,6 +732,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    259,
+/**/
     258,
 /**/
     257,