Updated semantics of isDefinedWidth so that width = 0 works as before. Added the same logic to FooterCell as well. (#7012)

svn changeset:20813/svn branch:6.7

src/com/vaadin/terminal/gwt/client/ui/VScrollTable.java

@@ -2280,7 +2280,7 @@ public class VScrollTable extends FlowPanel implements Table, ScrollHandler,
          * @return true if defined, false if "natural" width
          */
         public boolean isDefinedWidth() {
-            return definedWidth && width > 0;
+            return definedWidth && width >= 0;
         }
 
         public int getWidth() {
@@ -3313,7 +3313,7 @@ public class VScrollTable extends FlowPanel implements Table, ScrollHandler,
          * @return true if defined, false if "natural" width
          */
         public boolean isDefinedWidth() {
-            return definedWidth;
+            return definedWidth && width >= 0;
         }
 
         /**