Backport: Make reference argument const as not altered.

Backport of changeset 6719:c366b4a0ae98.

2 files changed, 2 insertions, 2 deletions

diff --git a/src/CallTip.cxx b/src/CallTip.cxx
index 7b322afeb..07188929c 100644
--- a/src/CallTip.cxx
+++ b/src/CallTip.cxx
@@ -254,7 +254,7 @@ void CallTip::MouseClick(Point pt) {
 PRectangle CallTip::CallTipStart(Sci::Position pos, Point pt, int textHeight, const char *defn,
                                  const char *faceName, int size,
                                  int codePage_, int characterSet,
-								 int technology, Window &wParent) {
+								 int technology, const Window &wParent) {
 	clickPlace = 0;
 	val = defn;
 	codePage = codePage_;
diff --git a/src/CallTip.h b/src/CallTip.h
index cb5d2c12c..9c00a777d 100644
--- a/src/CallTip.h
+++ b/src/CallTip.h
@@ -63,7 +63,7 @@ public:
 	/// Setup the calltip and return a rectangle of the area required.
 	PRectangle CallTipStart(Sci::Position pos, Point pt, int textHeight, const char *defn,
 		const char *faceName, int size, int codePage_,
-		int characterSet, int technology, Window &wParent);
+		int characterSet, int technology, const Window &wParent);
 
 	void CallTipCancel();