Fix launcher in case of empty arguments (#582)
Fix launcher in case of empty arguments (#582)

The regression was introduced in
d5327e6a0fd384cd36bfd0b4a12b27ab362543a7
a1ph/puppeteer,a1ph/puppeteer,elisherer/puppeteer,GoogleChrome/puppeteer,michaelfward/puppeteer,ianchn/puppeteer,puppeteer/puppeteer,ianchn/puppeteer,michaelfward/puppeteer,brutalcrozt/puppeteer,puppeteer/puppeteer,elisherer/puppeteer,GoogleChrome/puppeteer,GoogleChrome/puppeteer,brutalcrozt/puppeteer,puppeteer/puppeteer,puppeteer/puppeteer