ImageReader: get correct crop size

Bug: 10752797
Change-Id: I2e56d69cde7f5ca669a366646b876861b277a239
diff --git a/media/jni/android_media_ImageReader.cpp b/media/jni/android_media_ImageReader.cpp
index 94f20bc..16b45be 100644
--- a/media/jni/android_media_ImageReader.cpp
+++ b/media/jni/android_media_ImageReader.cpp
@@ -739,11 +739,9 @@
     int outputHeight = buffer->height;
 
     // Correct width/height when crop is set.
-    if (buffer->crop.getWidth() > 0) {
-        outputWidth = buffer->crop.getWidth() + 1;
-    }
-    if (buffer->crop.getHeight() > 0) {
-        outputHeight = buffer->crop.getHeight() + 1;
+    if (buffer->crop.isValid()) {
+        outputWidth = buffer->crop.getWidth();
+        outputHeight = buffer->crop.getHeight();
     }
 
     int imageReaderWidth = ctx->getBufferWidth();