guard against small/empty files when detecting Shiny extended type
guard against small/empty files when detecting Shiny extended type

JanMarvin/rstudio,jrnold/rstudio,JanMarvin/rstudio,jar1karp/rstudio,jrnold/rstudio,jrnold/rstudio,JanMarvin/rstudio,piersharding/rstudio,JanMarvin/rstudio,jrnold/rstudio,JanMarvin/rstudio,jrnold/rstudio,JanMarvin/rstudio,jar1karp/rstudio,jrnold/rstudio,jar1karp/rstudio,jar1karp/rstudio,jrnold/rstudio,JanMarvin/rstudio,jar1karp/rstudio,JanMarvin/rstudio,jar1karp/rstudio,piersharding/rstudio,piersharding/rstudio,jar1karp/rstudio,jar1karp/rstudio,jar1karp/rstudio,jrnold/rstudio,piersharding/rstudio,piersharding/rstudio,jrnold/rstudio,JanMarvin/rstudio,piersharding/rstudio,piersharding/rstudio,piersharding/rstudio,piersharding/rstudio