QS: Protect against crash with no icon

Change-Id: I65d594c9bf15190418d96cc6d2c426df00fed212
Fixes: 28941131
diff --git a/packages/SystemUI/src/com/android/systemui/qs/QSIconView.java b/packages/SystemUI/src/com/android/systemui/qs/QSIconView.java
index 6c224f7..9c4a149 100644
--- a/packages/SystemUI/src/com/android/systemui/qs/QSIconView.java
+++ b/packages/SystemUI/src/com/android/systemui/qs/QSIconView.java
@@ -80,7 +80,7 @@
             Drawable d = state.icon != null
                     ? iv.isShown() && mAnimationEnabled ? state.icon.getDrawable(mContext)
                     : state.icon.getInvisibleDrawable(mContext) : null;
-            int padding = state.icon != null ? state.icon.getPadding() : null;
+            int padding = state.icon != null ? state.icon.getPadding() : 0;
             if (d != null && state.autoMirrorDrawable) {
                 d.setAutoMirrored(true);
             }