Correctly catch mex compile errors.

Author: mpf

spgsetup.m

@@ -32,20 +32,20 @@
     mex oneProjectorMex.c oneProjectorCore.c heap.c -output oneProjectorMex -DNDEBUG
     fprintf('Successfully compiled oneProjector.\n');
     cd(root)
-catch
+catch err
     cd(root)
     fprintf('Could not compile oneProjector.');
     fprintf('You can still use the slower ".m" version.');
-    rethrow(lasterr);
+    rethrow(err);
 end
 
 try
     cd('private')
     mex productBMex.c -DNDEBUG
     fprintf('Successfully compiled productB.\n');
     cd(root)
-catch
+catch err
     cd(root)
     fprintf('Could not compile productB.');
-    rethrow(lasterr);
+    rethrow(err);
 end