Fixed parsing non-standard DECIMAL during min() and max().

DECIMAL() and DECIMAL(10,3) are not the same - but the type matches.

lib/query-interface.js

@@ -687,7 +687,12 @@ module.exports = (function() {
           var result = data ? data[attributeSelector] : null
 
           if (options && options.dataType) {
-            switch (options.dataType) {
+            var dataType = options.dataType;
+            if (dataType instanceof DataTypes.DECIMAL) {
+              dataType = DataTypes.DECIMAL;
+            }
+
+            switch (dataType) {
               case DataTypes.INTEGER:
               case DataTypes.BIGINT:
                 result = parseInt(result, 10);