Fix sample

Author: Rafael Baboni Dominiquini

build.gradle

@@ -23,6 +23,6 @@ ext {
     buildToolsVersion = '23.0.1'
     targetSdkVersion = 22
     minSdkVersion = 14
-    versionCode = 14
-    versionName = "0.5.2"
+    versionCode = 15
+    versionName = "0.5.3"
 }

sample/src/main/java/com/timehop/stickyheadersrecyclerview/sample/MainActivity.java

@@ -133,7 +133,7 @@ public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
     }
 
     @Override
-    public long getHeaderId(int position) {
+    public int getHeaderId(int position) {
       if (position == 0) {
         return -1;
       } else {
@@ -142,7 +142,7 @@ public long getHeaderId(int position) {
     }
 
     @Override
-    public RecyclerView.ViewHolder onCreateHeaderViewHolder(ViewGroup parent) {
+    public RecyclerView.ViewHolder onCreateHeaderViewHolder(ViewGroup parent, int position) {
       View view = LayoutInflater.from(parent.getContext())
           .inflate(R.layout.view_header, parent, false);
       return new RecyclerView.ViewHolder(view) {