fix(module:slider): fix slider min & max (#732)

src/components/badge/nz-badge.component.ts

@@ -50,7 +50,7 @@ import { toBoolean } from '../util/convert';
                                        class="ant-scroll-number-only"
                                        [style.transform]="'translateY('+((-countArray[i]*100))+'%)'">
         <ng-template [ngIf]="(!nzDot)&&(countArray[i]!=null)">
-          <p *ngFor="let p of countSingleArray" [class.current]="p==countArray[i]">{{p}}</p>
+          <p *ngFor="let p of countSingleArray" [class.current]="p==countArray[i]">{{ p }}</p>
         </ng-template>
         </span></ng-template>
       <ng-template [ngIf]="nzCount>nzOverflowCount">{{ nzOverflowCount }}+</ng-template>

src/components/slider/nz-slider.component.ts

@@ -216,13 +216,13 @@ export class NzSliderComponent implements ControlValueAccessor, OnInit, OnChange
   // clone & sort current value and convert them to offsets, then return the new one
   getValueToOffset(value?: SliderValue): SliderValue {
     let normalizedValue = value;
-    if (typeof value === 'undefined') {
+    if (typeof normalizedValue === 'undefined') {
       normalizedValue = this.getValue(true);
     }
     // TODO: using type guard, remove type cast
     return this.nzRange ?
       (normalizedValue as number[]).map(val => this.valueToOffset(val)) :
-      this.valueToOffset(value as number);
+      this.valueToOffset(normalizedValue as number);
   }
 
   writeValue(val: SliderValue): void { // NOTE: writeValue will be called twice when initialized (may BUG? see: https://github.com/angular/angular/issues/14988), here we just ignore the first inited(the first the onValueChange will not registered)

src/components/slider/nz-slider.service.ts

@@ -32,7 +32,7 @@ export class NzSliderService {
     let res = +num;
     if (isNaN(res)) { return min; }
     if (num < min) { res = min; } else if (num > max) { res = max; }
-    return num;
+    return res;
   }
 
   /**