Fix warnings with MSVC in EncUT_SliceBufferReallocate.cpp
Fix warnings with MSVC in EncUT_SliceBufferReallocate.cpp

This fixes the following warnings:
test/encoder/EncUT_SliceBufferReallocate.cpp(214) : warning C4800: 'int' : forcing value to bool 'true' or 'false' (performance warning)
test/encoder/EncUT_SliceBufferReallocate.cpp(214) : warning C4804: '%' : unsafe use of type 'bool' in operation
test/encoder/EncUT_SliceBufferReallocate.cpp(214) : warning C4800: 'int' : forcing value to bool 'true' or 'false' (performance warning)
test/encoder/EncUT_SliceBufferReallocate.cpp(324) : warning C4244: 'initializing' : conversion from 'double' to 'int32_t', possible loss of data
test/encoder/EncUT_SliceBufferReallocate.cpp(551) : warning C4800: 'int' : forcing value to bool 'true' or 'false' (performance warning)
test/encoder/EncUT_SliceBufferReallocate.cpp(649) : warning C4800: 'int' : forcing value to bool 'true' or 'false' (performance warning)

shihuade/openh264,shihuade/openh264,GuangweiWang/openh264,cisco/openh264,sijchen/openh264,shihuade/openh264,shihuade/openh264,GuangweiWang/openh264,ruil2/openh264,GuangweiWang/openh264,mstorsjo/openh264,cisco/openh264,GuangweiWang/openh264,mstorsjo/openh264,ruil2/openh264,ruil2/openh264,shihuade/openh264,sijchen/openh264,mstorsjo/openh264,GuangweiWang/openh264,mstorsjo/openh264,sijchen/openh264,cisco/openh264,ruil2/openh264,cisco/openh264,sijchen/openh264,ruil2/openh264,ruil2/openh264,ruil2/openh264,cisco/openh264,shihuade/openh264,mstorsjo/openh264,shihuade/openh264,cisco/openh264,sijchen/openh264,sijchen/openh264,sijchen/openh264,mstorsjo/openh264,GuangweiWang/openh264,cisco/openh264,mstorsjo/openh264,GuangweiWang/openh264