Add trim to image flip functions

Author: emersoncloud

jpegkit/src/main/cpp/jpegkit/jpeg.cpp

@@ -172,6 +172,7 @@ Java_jpegkit_Jpeg_jniFlipHorizontal
 
     tjtransform *transform = new tjtransform();
     transform->op = TJXOP_HFLIP;
+    transform->options = TJXOPT_TRIM;
 
     tjTransform(jpeg->transformer, jpeg->buffer, jpeg->size, 1, &jpeg->buffer, &jpeg->size, transform, 0);
 }
@@ -183,6 +184,7 @@ Java_jpegkit_Jpeg_jniFlipVertical
 
     tjtransform *transform = new tjtransform();
     transform->op = TJXOP_VFLIP;
+    transform->options = TJXOPT_TRIM;
 
     tjTransform(jpeg->transformer, jpeg->buffer, jpeg->size, 1, &jpeg->buffer, &jpeg->size, transform, 0);
 }