r=nisheeth@netscape.com Added asserts to help catch the case of poorly

targeted reflow commands

layout/html/table/src/nsTableFrame.cpp

@@ -2530,6 +2530,7 @@ NS_METHOD nsTableFrame::IncrementalReflow(nsIPresContext* aPresContext,
       // Get the next frame in the reflow chain
       nsIFrame* nextFrame;
       reflowState.reflowCommand->GetNext(nextFrame);
+      NS_ASSERTION(nextFrame, "next frame in reflow command is null"); 
 
       // Recover our reflow state
       rv = IR_TargetIsChild(aPresContext, aDesiredSize, state, aStatus, nextFrame);

layout/html/table/src/nsTableOuterFrame.cpp

@@ -327,6 +327,7 @@ nsresult nsTableOuterFrame::IncrementalReflow(nsIPresContext*        aPresContex
       // Get the next frame in the reflow chain
       nsIFrame* nextFrame;
       aReflowState.reflowState.reflowCommand->GetNext(nextFrame);
+      NS_ASSERTION(nextFrame, "next frame in reflow command is null"); 
 
       // Recover our reflow state
       RecoverState(aReflowState, nextFrame);

layout/tables/nsTableFrame.cpp

@@ -2530,6 +2530,7 @@ NS_METHOD nsTableFrame::IncrementalReflow(nsIPresContext* aPresContext,
       // Get the next frame in the reflow chain
       nsIFrame* nextFrame;
       reflowState.reflowCommand->GetNext(nextFrame);
+      NS_ASSERTION(nextFrame, "next frame in reflow command is null"); 
 
       // Recover our reflow state
       rv = IR_TargetIsChild(aPresContext, aDesiredSize, state, aStatus, nextFrame);

layout/tables/nsTableOuterFrame.cpp

@@ -327,6 +327,7 @@ nsresult nsTableOuterFrame::IncrementalReflow(nsIPresContext*        aPresContex
       // Get the next frame in the reflow chain
       nsIFrame* nextFrame;
       aReflowState.reflowState.reflowCommand->GetNext(nextFrame);
+      NS_ASSERTION(nextFrame, "next frame in reflow command is null"); 
 
       // Recover our reflow state
       RecoverState(aReflowState, nextFrame);