Fix conversion warning in mod-assign operations. 	Change on 2013/12/09 by kstanger <kstanger@google.com> ------------- Created by MOE: http://code.google.com/p/moe-java MOE_MIGRATED_REVID=57909080
Fix conversion warning in mod-assign operations.
	Change on 2013/12/09 by kstanger <kstanger@google.com>
-------------
Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=57909080

jiachenning/j2objc,ZouQingcang/MyProject,csripada/j2objc,hambroperks/j2objc,hambroperks/j2objc,ZouQingcang/MyProject,Sellegit/j2objc,hambroperks/j2objc,jiachenning/j2objc,csripada/j2objc,ZouQingcang/MyProject,csripada/j2objc,gank0326/j2objc,hambroperks/j2objc,jiachenning/j2objc,jiachenning/j2objc,gank0326/j2objc,ZouQingcang/MyProject,Sellegit/j2objc,gank0326/j2objc,Sellegit/j2objc,gank0326/j2objc,gank0326/j2objc,hambroperks/j2objc,Sellegit/j2objc,hambroperks/j2objc,hambroperks/j2objc,Sellegit/j2objc,ZouQingcang/MyProject,jiachenning/j2objc