CID#1038307 Negative loop bound
CID#1038307 Negative loop bound

fix of coverity#1038307 Negative loop bound
d9ac156b2d651c1305135938a1e828144aa5742b wasn't complete, it assigned possible
-1 int32 to unsigned value before comparison, so -1 not detected.

Change-Id: I6c2805acae8e776902d74c641e01c036193ce3d8

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