Silence int to bool conversion warnings

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TypeOf: Fix if/elif chain after msvc 6/7 removal.

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Thread: provide physical concurrency conditional until it no regression is introduced.

git-svn-id: http://svn.boost.org/svn/boost/trunk@85926 b8fc166d-592f-0410-95f2-cb63ce0dd405
Optimize and fix ambiguity of move_swap in Boost.Variant (refs #2839)
Fix GCC-4.8+ warning in variant_reference_test.cpp

git-svn-id: http://svn.boost.org/svn/boost/trunk@85927 b8fc166d-592f-0410-95f2-cb63ce0dd405
Fix MSVC warning in Boost.Variant (refs #3020)

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SmartPtr: Remove obsolete MSVC version checks.

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Math: Remove obsolete MSVC version check.

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Log: Remove obsolete MSVC version checks.

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Utility: Remove obsolete MSVC version check

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Wave: Remove obsolete MSVC version checks.

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Graph: Remove obsolete MSVC version checks.

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Interprocess: Remove obsolete MSVC version check

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TR1: Remove obsolete MSVC version checks.

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Test: Remove obsolete MSVC version checks.

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Bind: Remove obsolete MSVC version check

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MultiArray: Remove obsolete MSVC version checks.

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Iterator: Remove use of eti baseclass workaround.

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Ratio: Remove obsolete includes for eti workaround.

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MPL: Bump the MSVC compiler requirements

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MPL: Remove obsolete files for old MSVC compilers.

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