slightly optimized operator==() and equals()
slightly optimized operator==() and equals()

Change-Id: I05bacddf8cf61adbbcaed03c83ae42b06e76160a

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core