Don't take the previous paragraph style when deleting paragraph marker

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@52127 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/richtext/richtextbuffer.h

@@ -213,6 +213,11 @@ class WXDLLIMPEXP_RICHTEXT wxRichTextBuffer;
 #define wxTEXT_ATTR_EFFECTS                 0x00800000
 #define wxTEXT_ATTR_OUTLINE_LEVEL           0x01000000
 
+// A special flag telling the buffer to keep the first paragraph style
+// as-is, when deleting a paragraph marker. In future we might pass a
+// flag to InsertFragment and DeleteRange to indicate the appropriate mode.
+#define wxTEXT_ATTR_KEEP_FIRST_PARA_STYLE   0x10000000
+
 /*!
  * Styles for wxTextAttrEx::SetBulletStyle
  */