riched20: Use CharFromPos instead of FindPixelPos in LinkNotify so it accounts for scrolling.

dlls/riched20/editor.c

@@ -2581,12 +2581,15 @@ void ME_LinkNotify(ME_TextEditor *editor, UINT msg, WPARAM wParam, LPARAM lParam
 {
   int x,y;
   ME_Cursor tmpCursor;
+  int nCharOfs; /* The start of the clicked text. Absolute character offset */
+
   ME_Run *tmpRun;
-  BOOL bNothing;
+
   ENLINK info;
   x = (short)LOWORD(lParam);
   y = (short)HIWORD(lParam);
-  ME_FindPixelPos(editor, x, y, &tmpCursor, &bNothing);
+  nCharOfs = ME_CharFromPos(editor, x, y);
+  ME_CursorFromCharOfs(editor, nCharOfs, &tmpCursor);
   tmpRun = &tmpCursor.pRun->member.run;
 
   if ((tmpRun->style->fmt.dwMask & CFM_LINK)