Dane Springmeyer 9575bb8786 return value_null for null integer stored in shapefile dbf - closes #1638 - refs #1642		2012-12-11 19:40:46 -08:00
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input	return value_null for null integer stored in shapefile dbf - closes #1638 - refs #1642	2012-12-11 19:40:46 -08:00