gnu: mame: Update to 0.204.

* gnu/packages/emulators.scm (mame): Update to 0.204.
[arguments]: Add phase to fix compilation error.

gnu/packages/emulators.scm

@@ -1186,7 +1186,7 @@ play them on systems for which they were never designed!")
 (define-public mame
   (package
     (name "mame")
-    (version "0.203")
+    (version "0.204")
     (source
      (origin
        (method git-fetch)
@@ -1196,7 +1196,7 @@ play them on systems for which they were never designed!")
        (file-name (git-file-name name version))
        (sha256
         (base32
-         "19ccqc00024fbjyk0k5d9xljhwq7wsrp7phwm2jmn0h77mgdj844"))
+         "0yn63v2f1xlksfnvbxc5p5zpc7ps044m1kf69jhzbfirx953slsi"))
        (modules '((guix build utils)))
        (snippet
         ;; Remove bundled libraries.
@@ -1223,6 +1223,14 @@ play them on systems for which they were never designed!")
        #:phases
        (modify-phases %standard-phases
          (delete 'configure)
+         ;; Prevent compilation error: ‘atan’ is not a member of ‘std’.  Also
+         ;; fixed upstream in fec1cde5a40e197d4ed4314bf58b9e66e84e1631.
+         (add-after 'unpack 'fix-build
+           (lambda _
+             (substitute* "src/mame/video/xavix.cpp"
+               (("#include \"logmacro.h\"")
+                "#include \"logmacro.h\"\n#include <cmath>"))
+             #t))
          (add-after 'build 'build-documentation
            (lambda _ (invoke "make" "-C" "docs" "man" "info")))
          (replace 'install