tests: fix an warning on big left shifting. issue reported by Coverity
tests: fix an warning on big left shifting. issue reported by Coverity

fvrmatteo/capstone,AmesianX/capstone,xia0pin9/capstone,fvrmatteo/capstone,xia0pin9/capstone,xia0pin9/capstone,fvrmatteo/capstone,fvrmatteo/capstone,bSr43/capstone,bSr43/capstone,xia0pin9/capstone,bSr43/capstone,xia0pin9/capstone,bSr43/capstone,AmesianX/capstone,AmesianX/capstone,bSr43/capstone,AmesianX/capstone,fvrmatteo/capstone,xia0pin9/capstone,AmesianX/capstone,bSr43/capstone,fvrmatteo/capstone,fvrmatteo/capstone,xia0pin9/capstone,AmesianX/capstone,AmesianX/capstone,bSr43/capstone