message: check for missing files in build process
diff: @@ -155,7 +155,15 @@ module.exports = function(grunt) {
  }
  },
  src: dep_files,
  - dest: '<%= target %>/lib/jsxc.dep.js'
  + dest: '<%= target %>/lib/jsxc.dep.js',
  + filter: function (filepath) {
  + if (!grunt.file.exists(filepath)) {
  + grunt.fail.warn('Could not find: ' + filepath);
  + } else {
  + return true;
  + }
  + },
  + nonull: true,
  },
  jsxc: {
  options: {
  