PATCH: Fix TUI null pointer dereference

[Jim Blandy]

Andrew STUBBS <andrew.stubbs@st.com> writes:
> Index: src/gdb/tui/tui-command.c
> ===================================================================
> --- src.orig/gdb/tui/tui-command.c	2004-02-16 21:05:09.000000000 +0000
> +++ src/gdb/tui/tui-command.c	2005-10-17 14:33:06.000000000 +0100
> @@ -70,7 +70,7 @@ tui_dispatch_ctrl_char (unsigned int ch)
>        term = (char *) getenv ("TERM");
>        for (i = 0; (term && term[i]); i++)
>  	term[i] = toupper (term[i]);
> -      if ((strcmp (term, "XTERM") == 0) && key_is_start_sequence (ch))
> +      if (term && (strcmp (term, "XTERM") == 0) && key_is_start_sequence (ch))
>  	{
>  	  unsigned int page_ch = 0;
>  	  unsigned int tmp_char;

How about wrapping the upcasing loop and the 'if' after it all in one
big 'if (term), starting right after the 'getenv ("TERM")', and then
simplifying the conditional in the upcasing loop?