patch 8.1.1635: warnings for unused variables in small version

Problem:    Warnings for unused variables in small version. (John Marriott)
Solution:   Adjust #ifdefs.
diff --git a/src/screen.c b/src/screen.c
index d6761c8..58866bf 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -3265,11 +3265,13 @@
 #endif
 #if defined(FEAT_SIGNS) || defined(FEAT_QUICKFIX) \
 	|| defined(FEAT_SYN_HL) || defined(FEAT_DIFF)
-    int		sign_present = FALSE;
-    sign_attrs_T sattr;
 # define LINE_ATTR
     int		line_attr = 0;		/* attribute for the whole line */
 #endif
+#ifdef FEAT_SIGNS
+    int		sign_present = FALSE;
+    sign_attrs_T sattr;
+#endif
 #ifdef FEAT_SEARCH_EXTRA
     matchitem_T *cur;			/* points to the match list */
     match_T	*shl;			/* points to search_hl or a match */
diff --git a/src/version.c b/src/version.c
index d1e12c8..634cd08 100644
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1635,
+/**/
     1634,
 /**/
     1633,