修复条件属性中在未配置字体大小情况下，会生成默认字体大小的问题

ureport2-core/src/main/java/com/bstek/ureport/definition/CellStyle.java

@@ -32,7 +32,7 @@ public class CellStyle implements Serializable{
 	private static final long serialVersionUID = 8327688051735343849L;
 	private String bgcolor;
 	private String forecolor;
-	private int fontSize=10;
+	private int fontSize;
 	private String fontFamily;
 	private String format;
 	private float lineHeight;