patch 9.0.0870: get E967 when using text property in quickfix window

Problem:    Get E967 when using text property in quickfix window. (Sergey
            Vlasov)
Solution:   Do not add an extra NUL and compute the text length correctly.
            (closes #11513)

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    870,
 /**/
     869,
 /**/