Fixes compilation error caused by integer precision loss due to implicit (#518)
Fixes compilation error caused by integer precision loss due to implicit (#518)

conversion in sysinfo.cc
mockingbirdnest/benchmark,mockingbirdnest/benchmark,everbase/benchmark,mockingbirdnest/benchmark,google/benchmark,everbase/benchmark,google/benchmark,google/benchmark,everbase/benchmark,everbase/benchmark,mockingbirdnest/benchmark