patch 9.0.0318: clearing screen causes flicker

Problem:    Clearing screen causes flicker.
Solution:   Do not clear but redraw in more cases.  Add () to "wait_return".
diff --git a/src/if_cscope.c b/src/if_cscope.c
index 5d24533..945b019 100644
--- a/src/if_cscope.c
+++ b/src/if_cscope.c
@@ -2474,7 +2474,7 @@
 	}
     }
 
-    wait_return(TRUE);
+    wait_return(FALSE);
     return CSCOPE_SUCCESS;
 }