message: Fix crash in main when no command arg is provided
diff: @@ -630,7 +630,7 @@ int main(int Argc, char *Argv[]) {
  // If the first argument is "link"
  // ISPC will be used in a linkage mode
  - if (!strncmp(argv[1], "link", 4)) {
  + if (argc > 1 && !strncmp(argv[1], "link", 4)) {
  // Use bitcode format by default
  ot = Module::Bitcode;
  