[postgis-tickets] [PostGIS] #2552: [raster] ST_AsPNG and related fail on NULL raster

[PostGIS]

#2552: [raster] ST_AsPNG and related fail on NULL raster
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 Reporter:  dustymugs  |       Owner:  dustymugs    
     Type:  defect     |      Status:  new          
 Priority:  medium     |   Milestone:  PostGIS 2.0.5
Component:  raster     |     Version:  2.0.x        
 Keywords:             |  
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 {{{
 SELECT ST_AsPNG(null::raster)

 ERROR:  upper bound of FOR loop cannot be null
 CONTEXT:  PL/pgSQL function st_aspng(raster,text[]) line 20 at FOR with
 integer loop variable

 ********** Error **********

 ERROR: upper bound of FOR loop cannot be null
 SQL state: 22004
 Context: PL/pgSQL function st_aspng(raster,text[]) line 20 at FOR with
 integer loop variable

 }}}

 Correct response should be NULL

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/2552>
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