note 13029 deleted from function.imagewbmp by felipe

Note Submitter: flapper at redcube dot nl 

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There is a hidden third parameter in the ImageWbmp function that serves as a threshold-holder. When using the function as in:

ImageWbmp ($im, "test.wbmp");

it generates a warning:

Warning: imagewbmp: invalid threshold value '-1'. It must be between 0 and 255 in blablabla

It does generate the image though but for a WML app. it cannot be used since the warning is laden with HTML-tags. To prevent the warning use the following example:

ImageWbmp ($im, "test.wbmp", 0);

The warning is no longer generated.