itaVA deploy fixes in proto file

matlab/itaVA_build.m.proto

@@ -18,14 +18,14 @@ if exist( deploy_dir, 'dir' ) ~= 7
     error( 'Deploy dir ''%s'' does not exist. Please build and install VAMatlab first.', deploy_dir )
 end
 
-if exist( 'VAMatlab', 'file' )
+if exist( [ 'VAMatlab' mexext ], 'file' )
     warning( 'VAMatlab already found at location "%s", are you sure to build itaVA against this executable? Will proceed now.', which( 'VAMatlab' ) )
 else
     % Add to PATH temporarily and attempt to move lib to bin dir
-    addpath( script_dir, bin_dir )
+    addpath( script_dir, deploy_dir )
 
-    [ s ] = movefile( fullfile( lib_dir, 'VAMatlab*' ), bin_dir );
-    if ~s && ~exist( 'VAMatlab', 'file' )
+    [ s ] = movefile( fullfile( lib_dir, 'VAMatlab*' ), deploy_dir );
+    if ~s && ~exist( [ 'VAMatlab' mexext ], 'file' )
         error( 'Could locate VAMatlab executable. Please make sure that it can be found.' )
     end
 end