dbghelp: do not read from array element -1

[Peter Oberndorfer]

when debug_line_sect is -1 we read from array element -1
also dwarf2 parser is not prepared to get 0xffffffff as memory location

Changelog:
dbghelp: do not read from array element -1 if ELF section .debug_line is not present
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From 52d64286118f450f0c328f7410d905e52846e3b6 Mon Sep 17 00:00:00 2001
From: Peter Oberndorfer <kumbayo84 at arcor.de>
Date: Sat, 4 Nov 2006 20:05:27 +0100
Subject: [PATCH] dbghelp: do not read from array element -1
---
 dlls/dbghelp/elf_module.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/dlls/dbghelp/elf_module.c b/dlls/dbghelp/elf_module.c
index 0c83984..e640e7e 100644
--- a/dlls/dbghelp/elf_module.c
+++ b/dlls/dbghelp/elf_module.c
@@ -894,7 +894,8 @@ static BOOL elf_load_debug_info_from_map
             dw2_debug_abbrev = (const BYTE*) elf_map_section(fmap, debug_abbrev_sect);
             dw2_debug_str = (const BYTE*) elf_map_section(fmap, debug_str_sect);
             dw2_debug_line = (const BYTE*) elf_map_section(fmap, debug_line_sect);
-            if (dw2_debug != NO_MAP && NO_MAP != dw2_debug_abbrev && dw2_debug_str != NO_MAP)
+            if (dw2_debug != NO_MAP && dw2_debug_abbrev != NO_MAP &&
+                dw2_debug_str != NO_MAP && dw2_debug_line != NO_MAP)
             {
                 /* OK, now just parse dwarf2 debug infos. */
                 lret = dwarf2_parse(module, module->elf_info->elf_addr, thunks,
-- 
1.4.3.2