Only bring search view to front if it exists.
diff --git a/lib/src/main/java/com/artifex/mupdf/viewer/PageView.java b/lib/src/main/java/com/artifex/mupdf/viewer/PageView.java
index ff2dd2f..c3cf042 100644
--- a/lib/src/main/java/com/artifex/mupdf/viewer/PageView.java
+++ b/lib/src/main/java/com/artifex/mupdf/viewer/PageView.java
@@ -408,7 +408,8 @@
 				mPatch = new OpaqueImageView(mContext);
 				mPatch.setScaleType(ImageView.ScaleType.MATRIX);
 				addView(mPatch);
-				mSearchView.bringToFront();
+				if (mSearchView != null)
+					mSearchView.bringToFront();
 			}
 
 			CancellableTaskDefinition<Void, Void> task;