Fix minidump_stackwalk compilation on gcc 4.3. Patch by Jim Blandy
Fix minidump_stackwalk compilation on gcc 4.3. Patch by Jim Blandy

git-svn-id: 7939527bf0a06ad24ad020f729d5600cb42ed5d7@342 4c0a9323-5329-0410-9bdc-e9ce6186880e

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