dbghelp: When failing to look up for a PDB file, don't keep a module format object around.
diff --git a/dlls/dbghelp/msc.c b/dlls/dbghelp/msc.c
index 5fe3349..91927b3 100644
--- a/dlls/dbghelp/msc.c
+++ b/dlls/dbghelp/msc.c
@@ -2790,6 +2790,11 @@
         msc_dbg->module->module.SourceIndexed = TRUE;
         msc_dbg->module->module.Publics = TRUE;
     }
+    else
+    {
+        msc_dbg->module->format_info[DFI_PDB] = NULL;
+        HeapFree(GetProcessHeap(), 0, modfmt);
+    }
     return ret;
 }