Preview count now adds 1 if using header row (fixes #77)

papaparse.js

@@ -709,6 +709,8 @@
 
 			_results = new Parser(_config).parse(input);
 			return processResults();
+			if (_config.preview && _config.header)
+				_config.preview++;	// to compensate for header row
 		};
 
 		function processResults()

tests/test-cases.js

@@ -413,6 +413,16 @@ var PARSE_TESTS = [
 			errors: []
 		}
 	},
+	{
+		description: "Preview with header row",
+		notes: "Preview is defined to be number of rows of input not including header row",
+		input: 'a,b,c\r\nd,e,f\r\ng,h,i\r\nj,k,l',
+		config: { header: true, preview: 2 },
+		expected: {
+			data: [{"a": "d", "b": "e", "c": "f"}, {"a": "g", "b": "h", "c": "i"}],
+			errors: []
+		}
+	},
 	{
 		description: "Keep empty rows",
 		input: 'a,b,c\r\n\r\nd,e,f',