it will crash when i insert data on RadarChart

example：
`RadarChartDataEntry *entry1 =
[[RadarChartDataEntry alloc] initWithValue:[@"0.334" floatValue]];
RadarChartDataEntry *entry2 =
[[RadarChartDataEntry alloc] initWithValue:[@"0.330" floatValue]];
RadarChartDataEntry *entry3 =
[[RadarChartDataEntry alloc] initWithValue:[@"0.330" floatValue]];
[entries1 addObject:entry1];
[entries1 addObject:entry2];
[entries1 addObject:entry3];`

sometime when i insert some data，it will crash at YAxisRendererRadarChart.swift line 137。
`fatal error: Double value cannot be converted to Int because it is either infinite or NaN`

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