Kymograph horizontal line

[wmoore]

Kymograph error, when ROI is nearly parallel to the x axis. Error report, File "/home/omero/OMERO-CURRENT/lib/python/omero/gateway/init.py", line 2893, in createImageFromNumpySeq raise exc ZeroDivisionError?: float division.

[wmoore]

Also need to investigate this stacktrace - from a very small 20 x 20 pixel image (see ​https://github.com/ome/scripts/pull/71#issuecomment-38151265):

WARNING:omero.gateway:InternalException on <class 'omero.gateway.OmeroGatewaySafeCallWrapper'> to <c72cabfa-ba4b-46a1-93cb-65097db2a6e4omero.api.RawPixelsStore> getTile((1, 0, 0, 0, 0, -2, 5), {})
Traceback (most recent call last):
  File "/home/omero/slave/workspace/OMERO-5.0-merge-daily/src/dist/lib/python/omero/gateway/__init__.py", line 3539, in __call__
    return self.f(*args, **kwargs)
  File "/home/omero/slave/workspace/OMERO-5.0-merge-daily/src/dist/lib/python/omero_api_RawPixelsStore_ice.py", line 189, in getTile
    return _M_omero.api.RawPixelsStore._op_getTile.invoke(self, ((z, c, t, x, y, w, h), _ctx))
InternalException: exception ::omero::InternalException
{
    serverStackTrace = ome.conditions.InternalException:  Wrapped Exception: (java.lang.NegativeArraySizeException):
null
    at ome.services.RawPixelsBean.getTile(RawPixelsBean.java:781)
    at sun.reflect.GeneratedMethodAccessor1550.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
}}

[wmoore]

See fix for similar bug in Plot_Profile.py ​https://github.com/ome/scripts/pull/89