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Commit 7a18dd8e (Add searching of variables, 2003-03-07) added method cmCursesMainForm::JumpToCacheEntry to search for cache entries whose names match a given search string. The method also had a useless argument "int idx" probably left from earlier development iterations and hard-coded in all calls to the value '-1'. The method compared this argument to the "NumberOfVisibleEntries" member which at the time was of type "int" also. Commit ff1f8d0b (Fix or cast more integer conversions in cmake, 2010-06-29) changed the type of "NumberOfVisibleEntries" to size_t to fix other integer conversion warnings. An unsigned type makes sense given the purpose of the member. However, this caused the '-1' signed value to be converted to a large unsigned value in the above-mentioned comparison, leading to incorrect behavior. Fix the problem by removing the useless argument and the comparison.
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