patch 8.1.0979: compiler warning for unused functions

Problem:    Compiler warning for unused functions. (Yasuhiro Matsumoto)
Solution:   Adjust #ifdef.
diff --git a/src/screen.c b/src/screen.c
index aade363..eabf7c1 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -832,7 +832,7 @@
     return OK;
 }
 
-#if defined(FEAT_SIGNS) || defined(FEAT_GUI) || defined(FEAT_CONCEAL)
+#if defined(FEAT_NETBEANS_INTG) || defined(FEAT_GUI)
 /*
  * Prepare for updating one or more windows.
  * Caller must check for "updating_screen" already set to avoid recursiveness.
diff --git a/src/version.c b/src/version.c
index 850c27d..a5a6f7a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -780,6 +780,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    979,
+/**/
     978,
 /**/
     977,