Update XZ Utils to 5.0.3 (in deps)

src/liblzma/lzma/lzma2_decoder.c

Index: src/liblzma/lzma/lzma2_decoder.c
===================================================================
--- src/liblzma/lzma/lzma2_decoder.c	(revision 50504)
+++ src/liblzma/lzma/lzma2_decoder.c	(working copy)
@@ -67,6 +67,10 @@
 		const uint32_t control = in[*in_pos];
 		++*in_pos;
 
+		// End marker
+		if (control == 0x00)
+			return LZMA_STREAM_END;
+
 		if (control >= 0xE0 || control == 1) {
 			// Dictionary reset implies that next LZMA chunk has
 			// to set new properties.
@@ -104,10 +108,6 @@
 							&coder->options);
 			}
 		} else {
-			// End marker
-			if (control == 0x00)
-				return LZMA_STREAM_END;
-
 			// Invalid control values
 			if (control > 2)
 				return LZMA_DATA_ERROR;
@@ -191,7 +191,6 @@
 
 	case SEQ_COPY: {
 		// Copy from input to the dictionary as is.
-		// FIXME Can copy too much?
 		dict_write(dict, in, in_pos, in_size, &coder->compressed_size);
 		if (coder->compressed_size != 0)
 			return LZMA_OK;