patch 9.0.1618: Trace32 files are not recognized

Problem:    Trace32 files are not recognized.
Solution:   Add patterns for the t32 filetype. (Christoph Sax, closes #12505)
diff --git a/src/version.c b/src/version.c
index a3fc959..13888eb 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1618,
+/**/
     1617,
 /**/
     1616,