Fix loc error with cancelling in progress uploads

web/react/components/create_comment.jsx

@@ -285,7 +285,7 @@ class CreateComment extends React.Component {
 
             if (index !== -1) {
                 uploadsInProgress.splice(index, 1);
-                this.refs.fileUpload.cancelUpload(id);
+                this.refs.fileUpload.getWrappedInstance().cancelUpload(id);
             }
         } else {
             previews.splice(index, 1);

web/react/components/create_post.jsx

@@ -286,7 +286,7 @@ class CreatePost extends React.Component {
 
             if (index !== -1) {
                 uploadsInProgress.splice(index, 1);
-                this.refs.fileUpload.cancelUpload(id);
+                this.refs.fileUpload.getWrappedInstance().cancelUpload(id);
             }
         } else {
             previews.splice(index, 1);

web/react/components/file_upload.jsx

@@ -34,6 +34,7 @@ class FileUpload extends React.Component {
         this.uploadFiles = this.uploadFiles.bind(this);
         this.handleChange = this.handleChange.bind(this);
         this.handleDrop = this.handleDrop.bind(this);
+        this.cancelUpload = this.cancelUpload.bind(this);
 
         this.state = {
             requests: {}
@@ -331,4 +332,4 @@ FileUpload.propTypes = {
     postType: React.PropTypes.string
 };
 
-export default injectIntl(FileUpload);
+export default injectIntl(FileUpload, {withRef: true});