patch 8.2.3673: crash when allocating signal stack fails

Problem:    Crash when allocating signal stack fails.
Solution:   Only using sourcing info when available. (closes #9215)
diff --git a/src/version.c b/src/version.c
index d1004bb..3f83103 100644
--- a/src/version.c
+++ b/src/version.c
@@ -758,6 +758,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3673,
+/**/
     3672,
 /**/
     3671,