Merge branch 'js/spawn-via-shell-path-fix'

Mops up an unfortunate fallout from bw/spawn-via-shell-path topic.

By Johannes Sixt
* js/spawn-via-shell-path-fix:
  Do not use SHELL_PATH from build system in prepare_shell_cmd on Windows

run-command.c

@@ -156,7 +156,11 @@ static const char **prepare_shell_cmd(const char **argv)
 		die("BUG: shell command is empty");
 
 	if (strcspn(argv[0], "|&;<>()$`\\\"' \t\n*?[#~=%") != strlen(argv[0])) {
+#ifndef WIN32
 		nargv[nargc++] = SHELL_PATH;
+#else
+		nargv[nargc++] = "sh";
+#endif
 		nargv[nargc++] = "-c";
 
 		if (argc < 2)