Work around change in JNI func sigs between Java 6 and 7
Work around change in JNI func sigs between Java 6 and 7

Change-Id: I8f6a988ef8bd3642fe6997170dfb50935e6bf3b6

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