libjpeg(-turbo): maintenance update 1.4.1 -> 1.4.2

pkgs/development/libraries/libjpeg-turbo/default.nix

@@ -1,11 +1,11 @@
 { stdenv, fetchurl, nasm }:
 
 stdenv.mkDerivation rec {
-  name = "libjpeg-turbo-1.4.1";
+  name = "libjpeg-turbo-1.4.2";
 
   src = fetchurl {
     url = "mirror://sourceforge/libjpeg-turbo/${name}.tar.gz";
-    sha256 = "027vz97064bjmwj7gdw2p47y1437w08j54frpgzmnql5rvabmxab";
+    sha256 = "0gi349hp1x7mb98s4mf66sb2xay2kjjxj9ihrriw0yiy0k9va6sj";
   };
 
   buildInputs = [ nasm ];

pkgs/top-level/all-packages.nix

@@ -7081,7 +7081,7 @@ let
 
   libjpeg_original = callPackage ../development/libraries/libjpeg { };
   libjpeg_turbo = callPackage ../development/libraries/libjpeg-turbo { };
-  libjpeg = if (stdenv.isLinux) then libjpeg_turbo else libjpeg_original; # some problems, both on FreeBSD and Darwin
+  libjpeg = if stdenv.isLinux then libjpeg_turbo else libjpeg_original; # some problems, both on FreeBSD and Darwin
 
   libjpeg62 = callPackage ../development/libraries/libjpeg/62.nix {
     libtool = libtool_1_5;