Don't crash if no files need updating.
Don't crash if no files need updating.

nmrugg/LZMA-JS,zzzhan/LZMA-JS,zzzhan/LZMA-JS,nmrugg/LZMA-JS,addaleax/LZMA-JS,nmrugg/LZMA-JS,addaleax/LZMA-JS,addaleax/LZMA-JS,zzzhan/LZMA-JS