Remove "known_pagebreaks" from wxHtmlCell::AdjustPagebreak()

This parameter is not actually needed for any reasonable page breaking
algorithm, as it shouldn't care about any previous page breaks except
for the last one, which is already known as "*pagebreak - pageHeight" in
this function.

Removing it will allow to stop using wxArrayInt in the code using this
method and switch to an std::vector<int> instead.

This is not a backwards compatible change, but it seems that there is
very little code actually overriding this function (none could be found
in any open source repositories) and updating it should be as simple as
removing the now unneeded argument.

include/wx/html/htmprint.h

@@ -64,7 +64,7 @@ public:
 
     // Finds the next page break after the specified (vertical) position.
     // Returns wxNOT_FOUND if passed in position is the last page break.
-    int FindNextPageBreak(const wxArrayInt& known_pagebreaks, int pos);
+    int FindNextPageBreak(int pos);
 
     // [x,y] is position of upper-left corner of printing rectangle (see SetSize)
     // from is y-coordinate of the very first visible cell