patch 9.0.0050: split else-of is confusing

Problem:    Split else-of is confusing.
Solution:   Join the lines. (closes #10696)
diff --git a/src/gui.c b/src/gui.c
index d7e768f..2275189 100644
--- a/src/gui.c
+++ b/src/gui.c
@@ -2131,8 +2131,7 @@
 	    if (this_len > len)
 		this_len = len;	    // don't include following composing char
 	}
-	else
-	    if (gui.col + len > Columns)
+	else if (gui.col + len > Columns)
 	    this_len = Columns - gui.col;
 	else
 	    this_len = len;