Maximum TIFF file size exceeded

Hi,

I get the following error when running `export_fig 'fileName' -png -painters`:

```
Maximum TIFF file size exceeded
Use -dUseBigTIFF(=true) for BigTIFF output
Error: /unknownerror in --showpage--
Operand stack:
1 true
Execution stack:
%interp_exit .runexec2 --nostringval-- --nostringval-- --nostringval-- 2 %stopped_push --nostringval-- --nostringval-- --nostringval-- false 1 %stopped_push 1983 1 3 %oparray_pop 1982 1 3 %oparray_pop --nostringval-- 1858 0 3 %oparray_pop --nostringval-- --nostringval--
Dictionary stack:
--dict:1213/1684(ro)(G)-- --dict:0/20(G)-- --dict:126/200(L)--
Current allocation mode is local
GPL Ghostscript 9.20: Unrecoverable error, exit code 1
Maximum TIFF file size exceeded
Use -dUseBigTIFF(=true) for BigTIFF output
```

Have tried to reinstall Ghostscript 9.20 to no avail. Have Windows 10 and tried on Matlab 2014b and Matlab 2016a with the same result.

When checking in AppData/temp/ there's a TIFF-file with 4 GB of disk space allocated.

Do you know why I get this issue?

Regards