SwitchCursor() was crashing because it was passing NULL into strcmp, as this is the start value of the internal data.  Changed to use GetDataSafe()
SwitchCursor() was crashing because it was passing NULL into strcmp, as this
is the start value of the internal data.  Changed to use GetDataSafe()


git-svn-id: 28d9401aa571d5108e51b194aae6f24ca5964c06@17586 8cc4aa7f-3514-0410-904f-f2cc9021211c

crystalspace/CS,crystalspace/CS,crystalspace/CS,crystalspace/CS,crystalspace/CS,crystalspace/CS,crystalspace/CS,crystalspace/CS