NaN values transformation in funtion Transform from OGRCoordinateTransformation class

[mgfernandes]

When trying to transform an array with WGS84 latlon coordinates which has NaN values incorporated to UTM29 using functions Transform or TransformEX from class OGRCoordinateTransformation, the coordinates are transformed ok but the NaN values are transformed to Inf. This is the output from the test case I've attached:

Coordinates before transformation:

x: -8.95006 y: 37 -> is x nan: 0 is y nan: 0
x: -8.95009 y: 37 -> is x nan: 0 is y nan: 0
x: -1.#IND y: -1.#IND -> is x nan: 1 is y nan: 1
x: -8.94716 y: 37 -> is x nan: 0 is y nan: 0
x: -8.94716 y: 37 -> is x nan: 0 is y nan: 0

Coordinates after transformation:

x: 504444 y: 4.09488e+006 -> is x nan: 0 is y nan: 0
x: 504441 y: 4.09487e+006 -> is x nan: 0 is y nan: 0
x: 1.#INF y: 1.#INF -> is x nan: 0 is y nan: 0
x: 504702 y: 4.09487e+006 -> is x nan: 0 is y nan: 0
x: 504702 y: 4.09488e+006 -> is x nan: 0 is y nan: 0

The NaN values should be maintained.

[mgfernandes]

Transformation from latlon to utm29 using Transform from OGRCoordinateTransformation