checking for undefined in nextProps so we don't clear out the currentPage

Author: thechrisproject

build/reactable.js

@@ -1250,7 +1250,7 @@ window.ReactDOM["default"] = window.ReactDOM;
         }, {
             key: 'updateCurrentPage',
             value: function updateCurrentPage(nextPage) {
-                if (nextPage !== this.state.currentPage) {
+                if (typeof nextPage !== 'undefined' && nextPage !== this.state.currentPage) {
                     this.setState({ currentPage: nextPage });
                 }
             }

lib/reactable/table.js

@@ -281,7 +281,7 @@ var Table = (function (_React$Component) {
     }, {
         key: 'updateCurrentPage',
         value: function updateCurrentPage(nextPage) {
-            if (nextPage !== this.state.currentPage) {
+            if (typeof nextPage !== 'undefined' && nextPage !== this.state.currentPage) {
                 this.setState({ currentPage: nextPage });
             }
         }

src/reactable/table.jsx

@@ -240,7 +240,7 @@ export class Table extends React.Component {
     }
 
     updateCurrentPage(nextPage) {
-        if (nextPage !== this.state.currentPage) {
+        if (typeof(nextPage) !== 'undefined' && nextPage !== this.state.currentPage) {
             this.setState({ currentPage: nextPage});
         }
     }