Fix NaN error in slider

Author: rvsia

packages/pf4-component-mapper/src/files/slider.js

@@ -11,7 +11,7 @@ const Slider = (props) => {
 
   return (
     <FormGroup label={label} isRequired={isRequired} helperText={helperText} meta={meta} description={description} id={id || input.name}>
-      <Grid hasGutter>
+      <Grid gutter="md">
         <GridItem span={10}>
           <input
             className={'ddorg__pf4-component-mapper__dual-list-slider-input '}
@@ -22,7 +22,7 @@ const Slider = (props) => {
           />
         </GridItem>
         <GridItem span={2}>
-          <Badge isRead>{input.value || rest.max / 2}</Badge>
+          <Badge isRead>{input.value || (rest.max && rest.max / 2) || 50}</Badge>
         </GridItem>
       </Grid>
     </FormGroup>