NAME
        FindToolType - find the value of a ToolType variable.

   SYNOPSIS
        value = FindToolType(toolTypeArray, typeName)
          D0                      A0           A1

        strptr findtooltype(strptr *, strptr);

   FUNCTION
        This function searches a tool type array for a given entry,
        and returns a pointer to that entry.  This is useful for
        finding standard tool type variables.  The returned
        value is not a new copy of the string but is only
        a pointer to the part of the string after typeName.

   INPUTS
        toolTypeArray -- an array of strings (STRPTR *).
        typeName -- the name of the tooltype entry (STRPTR).

   RESULTS
        value -- a pointer to a string that is the value bound to typeName,
                or NULL if typeName is not in the toolTypeArray.

   EXAMPLE
        Assume the tool type array has two strings in it:
            "FILETYPE=text"
            "TEMPDIR=:t"

        FindToolType( toolTypeArray, "FILETYPE" ) returns "text"
        FindToolType( toolTypeArray, "filetype" ) returns "text"
        FindToolType( toolTypeArray, "TEMPDIR" )  returns ":t"
        FindToolType( toolTypeArray, "MAXSIZE" )  returns NULL
        FindToolType( toolTypeArray, "text" )     returns NULL
        FindToolType( toolTypeArray, ":t" )       returns NULL

   NOTES
        icon.library V44 tolerates tool type strings with additional
        blanks around the '=' character, such as in "FILETYPE = text".
        Older icon.library versions did not support this.

   SEE ALSO
        icon.library/matchtoolvalue