With the introduction of SimplifyingFilterVisitor for StreamingRenderer on 
trunk, rasters with a rastersymbolizer no longer work due to a NPE
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                 Key: GEOT-2543
                 URL: http://jira.codehaus.org/browse/GEOT-2543
             Project: GeoTools
          Issue Type: Bug
          Components: core render
    Affects Versions: 2.6-M1
            Reporter: Gabriel Roldán
            Assignee: Gabriel Roldán
             Fix For: 2.6-M2


Rendering a raster with a rastersymbolizer on 2.5.x is fine, but on trunk fails 
with an NPE at StreamingRenderer line 905: {{Filter simplified = 
(Filter)query.getFilter().accept(simplifier, null);}}
Reason being the query filter is null as the result of line 858: {{filter = 
createBBoxFilters(schema, attributes, envelope);}}
So the issue is actually about respecting the Query contract, where filter 
should be Filter.INCLUDE instead of null.

If not told otherwise, I will just fix by checking the query is not being set a 
null filter, but Filter.INCLUDE.

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