Update SQLiteAdapter.swift

Author: denissimon

Sources/SQLiteAdapter/SQLiteAdapter.swift

@@ -536,7 +536,7 @@ open class SQLite: SQLiteType {
         let columnCount = sqlite3_column_count(sqlStatement)
         for index in 0..<columnCount {
             if let columnName = sqlite3_column_name(sqlStatement, index) {
-                if let validatedColumnName = String(validatingUTF8: columnName) {
+                if let validatedColumnName = String(validatingCString: columnName) {
                     columnNamesToReturn.append(validatedColumnName)
                 } else {
                     throw SQLiteError.Column(getErrorMessage(dbPointer: dbPointer))