fix signed/unsigned problem for symbol maps
fix signed/unsigned problem for symbol maps

edrogers/rstudio,jar1karp/rstudio,maligulzar/Rstudio-instrumented,more1/rstudio,pssguy/rstudio,john-r-mcpherson/rstudio,jar1karp/rstudio,john-r-mcpherson/rstudio,vbelakov/rstudio,piersharding/rstudio,more1/rstudio,suribes/rstudio,maligulzar/Rstudio-instrumented,tbarrongh/rstudio,brsimioni/rstudio,tbarrongh/rstudio,suribes/rstudio,brsimioni/rstudio,JanMarvin/rstudio,john-r-mcpherson/rstudio,jzhu8803/rstudio,maligulzar/Rstudio-instrumented,sfloresm/rstudio,JanMarvin/rstudio,githubfun/rstudio,edrogers/rstudio,tbarrongh/rstudio,jrnold/rstudio,jar1karp/rstudio,maligulzar/Rstudio-instrumented,piersharding/rstudio,piersharding/rstudio,brsimioni/rstudio,tbarrongh/rstudio,nvoron23/rstudio,pssguy/rstudio,sfloresm/rstudio,edrogers/rstudio,githubfun/rstudio,suribes/rstudio,jar1karp/rstudio,sfloresm/rstudio,jrnold/rstudio,thklaus/rstudio,jrnold/rstudio,brsimioni/rstudio,piersharding/rstudio,brsimioni/rstudio,JanMarvin/rstudio,jar1karp/rstudio,piersharding/rstudio,pssguy/rstudio,tbarrongh/rstudio,sfloresm/rstudio,edrogers/rstudio,tbarrongh/rstudio,jzhu8803/rstudio,tbarrongh/rstudio,jar1karp/rstudio,JanMarvin/rstudio,piersharding/rstudio,nvoron23/rstudio,suribes/rstudio,pssguy/rstudio,brsimioni/rstudio,githubfun/rstudio,maligulzar/Rstudio-instrumented,githubfun/rstudio,jrnold/rstudio,thklaus/rstudio,piersharding/rstudio,vbelakov/rstudio,nvoron23/rstudio,vbelakov/rstudio,vbelakov/rstudio,nvoron23/rstudio,john-r-mcpherson/rstudio,thklaus/rstudio,JanMarvin/rstudio,jrnold/rstudio,jzhu8803/rstudio,brsimioni/rstudio,pssguy/rstudio,edrogers/rstudio,thklaus/rstudio,nvoron23/rstudio,githubfun/rstudio,jrnold/rstudio,tbarrongh/rstudio,maligulzar/Rstudio-instrumented,suribes/rstudio,vbelakov/rstudio,more1/rstudio,JanMarvin/rstudio,john-r-mcpherson/rstudio,jrnold/rstudio,jzhu8803/rstudio,thklaus/rstudio,sfloresm/rstudio,more1/rstudio,suribes/rstudio,john-r-mcpherson/rstudio,edrogers/rstudio,thklaus/rstudio,jzhu8803/rstudio,edrogers/rstudio,jar1karp/rstudio,piersharding/rstudio,pssguy/rstudio,more1/rstudio,edrogers/rstudio,vbelakov/rstudio,pssguy/rstudio,jrnold/rstudio,thklaus/rstudio,vbelakov/rstudio,JanMarvin/rstudio,brsimioni/rstudio,sfloresm/rstudio,sfloresm/rstudio,jrnold/rstudio,more1/rstudio,nvoron23/rstudio,thklaus/rstudio,more1/rstudio,pssguy/rstudio,suribes/rstudio,sfloresm/rstudio,JanMarvin/rstudio,suribes/rstudio,maligulzar/Rstudio-instrumented,githubfun/rstudio,jar1karp/rstudio,piersharding/rstudio,john-r-mcpherson/rstudio,jzhu8803/rstudio,githubfun/rstudio,JanMarvin/rstudio,githubfun/rstudio,jzhu8803/rstudio,maligulzar/Rstudio-instrumented,jzhu8803/rstudio,john-r-mcpherson/rstudio,vbelakov/rstudio,maligulzar/Rstudio-instrumented,jar1karp/rstudio,nvoron23/rstudio,more1/rstudio