Fix a memory leak in opj_jp2_read_ihdr().

third_party/libopenjpeg20/jp2.c

Index: third_party/libopenjpeg20/jp2.c
diff --git a/third_party/libopenjpeg20/jp2.c b/third_party/libopenjpeg20/jp2.c
index 3bcb42ea864e8a286655832c9fbe995671be563f..a6648f637ddbb30a18535587022400cdf666a64f 100644
--- a/third_party/libopenjpeg20/jp2.c
+++ b/third_party/libopenjpeg20/jp2.c
@@ -561,6 +561,7 @@ static OPJ_BOOL opj_jp2_read_ihdr( opj_jp2_t *jp2,
 	p_image_header_data += 2;
 
 	/* allocate memory for components */
+	opj_free(jp2->comps);
 	jp2->comps = (opj_jp2_comps_t*) opj_calloc(jp2->numcomps, sizeof(opj_jp2_comps_t));
 	if (jp2->comps == 0) {
 		opj_event_msg(p_manager, EVT_ERROR, "Not enough memory to handle image header (ihdr)\n");
@@ -1758,6 +1759,7 @@ void opj_jp2_setup_decoder(opj_jp2_t *jp2, opj_dparameters_t *parameters)
 
 	/* further JP2 initializations go here */
 	jp2->color.jp2_has_colr = 0;
+	jp2->comps = NULL;
     jp2->ignore_pclr_cmap_cdef = parameters->flags & OPJ_DPARAMETERS_IGNORE_PCLR_CMAP_CDEF_FLAG;
 }
 
@@ -1815,7 +1817,6 @@ OPJ_BOOL opj_jp2_setup_encoder(	opj_jp2_t *jp2,
 	jp2->numcomps = image->numcomps;	/* NC */
 	jp2->comps = (opj_jp2_comps_t*) opj_malloc(jp2->numcomps * sizeof(opj_jp2_comps_t));
 	if (!jp2->comps) {
-		jp2->comps = NULL;
 		opj_event_msg(p_manager, EVT_ERROR, "Not enough memory when setup the JP2 encoder\n");
 		/* Memory of jp2->cl will be freed by opj_jp2_destroy */
 		return OPJ_FALSE;