ImageMagick install works, fixes Homebrew/homebrew#35

Careless mistake from me.

Formula/imagemagick.rb

@@ -36,9 +36,9 @@ class Imagemagick <Formula
     system "make install"
 
     # We already copy these into the keg root
-    (share+'NEWS.txt').unlink
-    (share+'LICENSE').unlink
-    (share+'ChangeLog').unlink
+    (share+'ImageMagick'+'NEWS.txt').unlink
+    (share+'ImageMagick'+'LICENSE').unlink
+    (share+'ImageMagick'+'ChangeLog').unlink
   end
 
   def caveats

Formula/scummvm.rb

@@ -21,7 +21,6 @@ prefer to use theirs. If so type `brew home scummvm' to visit their site.
   def install
     system "./configure --prefix='#{prefix}' --disable-debug"
     system "make install"
-    share=prefix+'share'
     (share+'pixmaps').rmtree
   end
 end