- made minor changes for -Wextra for Mac build, see mac_wextra.patch
- crash fix for running with reduced CPU float precision, see
float_precision_crash.patch and crbug.com/123157
- - Fix for 'warning C4703: potentially uninitialized local pointer variable'
- in VS2012.
- - Disable optimization on VS2013 pending fix of compiler optimization bug.
+ - fixed warnings under msvc, see msvc_warnings.patch
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