Fix nonstandard type conversion.

Author: nitrocaster

src/xrEngine/Feel_Touch.h

@@ -7,6 +7,7 @@ namespace Feel
 {
 class ENGINE_API Touch : private pure_relcase
 {
+    friend class pure_relcase;
 public:
     struct DenyTouch
     {

src/xrEngine/Feel_Vision.h

@@ -17,6 +17,7 @@ const float lr_granularity = 0.1f; // assume similar positions
 
 class ENGINE_API Vision : private pure_relcase
 {
+    friend class pure_relcase;
 private:
     xr_vector<CObject*> seen;
     xr_vector<CObject*> query;

src/xrGame/game_sv_deathmatch.h

@@ -10,6 +10,7 @@ class IClient;
 
 class	game_sv_Deathmatch			: public game_sv_mp,private pure_relcase
 {
+    friend class pure_relcase;
 	typedef game_sv_mp inherited;
 protected:
 	struct		RPointData