Update DrawableHelper.kt

rocket-chat-android-widgets/src/main/java/chat/rocket/android/widget/helper/DrawableHelper.kt

@@ -13,9 +13,11 @@ object DrawableHelper {
      * @param drawable The drawable to wrap.
      * @see tintDrawable
      */
-    fun wrapDrawable(drawable: Drawable) {
+    fun wrapDrawable(drawable: Drawable?) {
+        if (drawable != null) {
             DrawableCompat.wrap(drawable)
         }
+    }
 
     /**
      * REMARK: You MUST always wrap the drawable before tint it.
@@ -25,7 +27,9 @@ object DrawableHelper {
      * @param resId The resource id color to tint the drawable.
      * @see wrapDrawable
      */
-    fun tintDrawable(drawable: Drawable, context: Context, resId: Int) {
+    fun tintDrawable(drawable: Drawable?, context: Context, resId: Int) {
+        if (drawable != null) {
             DrawableCompat.setTint(drawable, ContextCompat.getColor(context, resId))
         }
+    }
 }
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