Fix luacheck errors in egp.lua
Fix luacheck errors in egp.lua

    lua/wire/stools/egp.lua:178:11: setting non-standard global variable refreshRT
    lua/wire/stools/egp.lua:184:11: setting non-standard global variable refreshObjects
    lua/wire/stools/egp.lua:211:9: variable lbl was previously defined on line 206
    lua/wire/stools/egp.lua:223:4: accessing undefined variable refreshRT
    lua/wire/stools/egp.lua:235:4: accessing undefined variable refreshObjects
    lua/wire/stools/egp.lua:249:5: accessing undefined variable refreshRT
    lua/wire/stools/egp.lua:254:4: accessing undefined variable refreshObjects
    lua/wire/stools/egp.lua:264:8: unused loop variable k
    lua/wire/stools/egp.lua:265:5: accessing undefined variable refreshRT
    lua/wire/stools/egp.lua:277:4: accessing undefined variable refreshObjects
    lua/wire/stools/egp.lua:287:8: unused loop variable k
    lua/wire/stools/egp.lua:288:5: accessing undefined variable refreshRT
    lua/wire/stools/egp.lua:292:4: accessing undefined variable refreshObjects
dvdvideo1234/wire,wiremod/wire,NezzKryptic/Wire,sammyt291/wire,Grocel/wire