jQuery Grid Plugin - jqGrid

After unformat cell is empty because the function can't find value that content ':'.

In unformat.select function missing lines that check if 'split(":")' return array of 2 values or more (like exist in 

fmatter.select function)
missing lines:

					if(sv.length > 2 ) {
						sv[1] = jQuery.map(sv,function(n,i){if(i>0) { return n; } }).join(":");
					}