patch 8.1.0694: when using text props may free memory that is not allocated

Problem:    When using text props may free memory that is not allocated.
            (Andy Massimino)
Solution:   Allocate the line when adjusting text props. (closes #3766)
diff --git a/src/version.c b/src/version.c
index 7d3a5f6..3450325 100644
--- a/src/version.c
+++ b/src/version.c
@@ -800,6 +800,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    694,
+/**/
     693,
 /**/
     692,