Eric Pouech : dbghelp: Return proper null value when lookup_type fails.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 96a38c93d54751c5593e5780e1722322cb498e1f
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=96a38c93d54751c5593e5780e1722322cb498e1f

Author: Eric Pouech <eric.pouech at orange.fr>
Date:   Sat Mar 26 12:16:39 2011 +0100

dbghelp: Return proper null value when lookup_type fails.

---

 dlls/dbghelp/dwarf.c |   26 ++++++++++++++------------
 1 files changed, 14 insertions(+), 12 deletions(-)

diff --git a/dlls/dbghelp/dwarf.c b/dlls/dbghelp/dwarf.c
index 5596c45..f0eabaf 100644
--- a/dlls/dbghelp/dwarf.c
+++ b/dlls/dbghelp/dwarf.c
@@ -941,22 +941,24 @@ static BOOL dwarf2_compute_location_attr(dwarf2_parse_context_t* ctx,
 static struct symt* dwarf2_lookup_type(dwarf2_parse_context_t* ctx,
                                        const dwarf2_debug_info_t* di)
 {
-    struct attribute    attr;
+    struct attribute attr;
+    dwarf2_debug_info_t* type;
 
-    if (dwarf2_find_attribute(ctx, di, DW_AT_type, &attr))
+    if (!dwarf2_find_attribute(ctx, di, DW_AT_type, &attr))
+        return NULL;
+    if (!(type = sparse_array_find(&ctx->debug_info_table, attr.u.uvalue)))
     {
-        dwarf2_debug_info_t*    type;
-        
-        type = sparse_array_find(&ctx->debug_info_table, attr.u.uvalue);
-        if (!type) FIXME("Unable to find back reference to type %lx\n", attr.u.uvalue);
+        FIXME("Unable to find back reference to type %lx\n", attr.u.uvalue);
+        return NULL;
+    }
+    if (!type->symt)
+    {
+        /* load the debug info entity */
+        dwarf2_load_one_entry(ctx, type);
         if (!type->symt)
-        {
-            /* load the debug info entity */
-            dwarf2_load_one_entry(ctx, type);
-        }
-        return type->symt;
+            FIXME("Unable to load forward reference for tag %lx\n", type->abbrev->tag);
     }
-    return NULL;
+    return type->symt;
 }
 
 static const char* dwarf2_get_cpp_name(dwarf2_parse_context_t* ctx, dwarf2_debug_info_t* di, const char* name)