[binutils-gdb] Simplify tui_show_disassem

[Tom Tromey]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=22c3f4909af125b457564db66e3cb3c56cb9abd3

commit 22c3f4909af125b457564db66e3cb3c56cb9abd3
Author: Tom Tromey <tom@tromey.com>
Date:   Fri Jul 5 12:38:44 2019 -0600

    Simplify tui_show_disassem
    
    tui_show_disassem does not need to call tui_add_win_to_layout, because
    the callers that could change the layout have already ensured that it
    exists.
    
    gdb/ChangeLog
    2019-08-13  Tom Tromey  <tom@tromey.com>
    
    	* tui/tui-disasm.c (tui_show_disassem): Add assertion.  Don't call
    	tui_add_win_to_layout.

Diff:
---
 gdb/ChangeLog        | 5 +++++
 gdb/tui/tui-disasm.c | 3 ++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 8e70be6..5012842 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,10 @@
 2019-08-13  Tom Tromey  <tom@tromey.com>
 
+	* tui/tui-disasm.c (tui_show_disassem): Add assertion.  Don't call
+	tui_add_win_to_layout.
+
+2019-08-13  Tom Tromey  <tom@tromey.com>
+
 	* tui/tui-layout.h (tui_default_win_height): Don't declare.
 	* tui/tui-layout.c (tui_default_win_height): Now static.
 
diff --git a/gdb/tui/tui-disasm.c b/gdb/tui/tui-disasm.c
index 80f8d47..a442a00 100644
--- a/gdb/tui/tui-disasm.c
+++ b/gdb/tui/tui-disasm.c
@@ -255,9 +255,10 @@ tui_show_disassem (struct gdbarch *gdbarch, CORE_ADDR start_addr)
   struct tui_win_info *win_with_focus = tui_win_with_focus ();
   struct tui_line_or_address val;
 
+  gdb_assert (TUI_DISASM_WIN != nullptr && TUI_DISASM_WIN->is_visible);
+
   val.loa = LOA_ADDRESS;
   val.u.addr = start_addr;
-  tui_add_win_to_layout (DISASSEM_WIN);
   tui_update_source_window (TUI_DISASM_WIN, gdbarch, s, val, FALSE);
 
   /* If the focus was in the src win, put it in the asm win, if the