Remove warnings

app/src/main/java/net/pokeranalytics/android/util/csv/CSVDescriptor.kt

@@ -92,7 +92,7 @@ abstract class CSVDescriptor(var source: DataSource, vararg elements: CSVField)
 	protected var fieldMapping: MutableMap<CSVField, Int> = mutableMapOf()
 
 	init {
-		if (elements.size > 0) {
+		if (elements.isNotEmpty()) {
 			this.fields = elements.toList()
 		}
 	}
@@ -126,9 +126,9 @@ abstract class CSVDescriptor(var source: DataSource, vararg elements: CSVField)
 				count++
 			}
 		}
-		val mandatoryfields = this.fields.filter { it.optional == false }
+		val mandatoryFields = this.fields.filter { !it.optional }
 		Timber.d("source= ${this.source.name} > total fields = ${this.fields.size}, identified = $count")
-		return count >= mandatoryfields.size
+		return count >= mandatoryFields.size
 	}
 
 }