fix: InputNumber return default value when entry illegal character with precision (#810)

Co-authored-by: fengxin <[email protected]>

packages/semi-foundation/inputNumber/foundation.ts

@@ -432,7 +432,7 @@ class InputNumberFoundation extends BaseFoundation<InputNumberAdapter> {
 
     _adjustPrec(num: string | number) {
         const precision = this.getProp('precision');
-        if (typeof precision === 'number' && num !== '') {
+        if (typeof precision === 'number' && num !== '' && num !== null && !Number.isNaN(Number(num))) {
             num = Number(num).toFixed(precision);
         }
         return toString(num);