* In the JDK packages, don't return false if the platform is

unsupported.  This gives a type error ("value is a boolean while 
  an attribute set was expected").

svn path=/nixpkgs/trunk/; revision=8576

pkgs/development/compilers/jdk/default-1.4.nix

@@ -6,4 +6,4 @@ if stdenv.system == "i686-linux"
       inherit stdenv fetchurl;
     }
   else
-    false
+    abort "the Java 2 SDK is not supported on this platform"

pkgs/development/compilers/jdk/default.nix

@@ -4,7 +4,7 @@ if args.stdenv.system == "i686-linux" || args.stdenv.system == "x86_64-linux" th
   (import ./jdk6-linux.nix) args
 
 else if args.stdenv.system == "powerpc-linux"  then
- (import ./jdk5-ibm-powerpc-linux.nix) args
+  (import ./jdk5-ibm-powerpc-linux.nix) args
 
 else
-  false
+  abort "the JDK is not supported on this platform"