xz: Remove comma at end of enumerator list

Fixes warning seen when compiling software in c89 mode that uses liblzma.

archivers/xz/Portfile

@@ -4,6 +4,7 @@ PortSystem      1.0
 
 name            xz
 version         5.2.3
+revision        1
 categories      archivers
 # some executables are GPL, libs and everything else are public domain
 license         {public-domain GPL-2+}
@@ -22,10 +23,13 @@ master_sites    ${homepage}
 use_bzip2       yes
 
 checksums       rmd160  343c42e8485b874f8b797c703ee8d2edc8812090 \
-                sha256  fd9ca16de1052aac899ad3495ad20dfa906c27b4a5070102a2ec35ca3a4740c1
+                sha256  fd9ca16de1052aac899ad3495ad20dfa906c27b4a5070102a2ec35ca3a4740c1 \
+                size    1207242
 
 depends_lib     port:libiconv port:gettext
 
+patchfiles      c89.patch
+
 configure.args  --with-libiconv-prefix=${prefix} --with-libintl-prefix=${prefix}
 
 # document that we always need legacy symlinks now that "lzmautils" refers here

archivers/xz/files/c89.patch

@@ -0,0 +1,11 @@
+--- src/liblzma/api/lzma/base.h.orig	2016-12-30 05:08:20.000000000 -0600
++++ src/liblzma/api/lzma/base.h	2018-03-23 21:42:31.000000000 -0500
+@@ -215,7 +215,7 @@
+ 		 * applications a little.
+ 		 */
+
+-	LZMA_PROG_ERROR         = 11,
++	LZMA_PROG_ERROR         = 11
+ 		/**<
+ 		 * \brief       Programming error
+ 		 *