Add missing multipoint support to MITAB

[gaige]

Previously Map Info TAB format files could read but not write multipoint geometry. This adds writing multipoint geometry to the CreateFeature code.

I apologize for the lack of test files for you. Fortunately, I have a really nice round-trip testbed that allows me to verify that the data written and the data read are the same (within a very specific set of parameters), unfortunately it's tied tightly to my software and can't be separated out for distribution.

==== /ogr/ogrsf_frmts/mitab/mitab_imapinfofile.cpp
357d356
<       case wkbMultiPoint:
372a372,381
>       case wkbMultiPoint:
>         poTABFeature = new TABMultiPoint(poFeature->GetDefnRef());
>         if(poFeature->GetStyleString())
>         {
>             poTABPointFeature = (TABPoint*)poTABFeature;
>             poTABPointFeature->SetSymbolFromStyleString(
>                 poFeature->GetStyleString());
>         }
> 		break;
> 		

[Even Rouault]

Gaige,

the normal process for changing files belonging to MITAB is to submit them to upstream MITAB. CC'ing Daniel Morissette, the MITAB maintener.

[gaige]

Got it. Thank you, -Gaige

[Jukka Rahkonen]

I believe that multipoints are still not written but they are converted to many points but I am not sure. Waiting some comment from mitab folks.

[Even Rouault]

Just tested it works OK.