gnu: mlt: Update to 6.12.0.

* gnu/packages/video.scm (mlt): Update to 6.12.0.
[arguments]: Re-indent.

gnu/packages/video.scm

@@ -2039,7 +2039,7 @@ from sites like Twitch.tv and pipes them into a video player of choice.")
 (define-public mlt
   (package
     (name "mlt")
-    (version "6.10.0")
+    (version "6.12.0")
     (source (origin
               (method git-fetch)
               (uri (git-reference
@@ -2048,13 +2048,7 @@ from sites like Twitch.tv and pipes them into a video player of choice.")
               (file-name (git-file-name name version))
               (sha256
                (base32
-                "0ki86yslr5ywa6sz8pjrgd9a4rn2rr4mss2zkmqi7pq8prgsm1fr"))
-              (modules '((guix build utils)))
-              (snippet '(begin
-                          ;; As of glibc 2.26, <xlocale.h> no longer is.
-                          (substitute* "src/framework/mlt_property.h"
-                            (("xlocale\\.h") "locale.h"))
-                          #t))))
+                "0pzm3mjbbdl2rkbswgyfkx552xlxh2qrwzsi2a4dicfr92rfgq6w"))))
     (build-system gnu-build-system)
     (arguments
      `(#:tests? #f                      ; no tests