Use C4Real instead of C4Fixed where representation is irrelevant

While C4Real is just a typedef for C4Fixed, it signifies more clearly
that we don't care about the memory representation at the point of use.

src/game/C4GameScript.cpp

@@ -902,7 +902,7 @@ static bool FnSetPlayerZoom(C4PropList * _this, long plr_idx, long zoom, long pr
 	{
 		// zoom factor calculation
 		if (!precision) precision = 1;
-		C4Fixed fZoom = itofix(zoom, precision);
+		C4Real fZoom = itofix(zoom, precision);
 		// safety check on player only, so function return result is always in sync
 		C4Player *plr = ::Players.Get(plr_idx);
 		if (!plr) return false;

src/player/C4Player.cpp

@@ -1818,19 +1818,19 @@ void C4Player::SetMaxZoomByViewRange(int32_t range_wdt, int32_t range_hgt, bool
 	ZoomLimitsToViewports();
 }
 
-void C4Player::SetZoom(C4Fixed zoom, bool direct, bool no_increase, bool no_decrease)
+void C4Player::SetZoom(C4Real zoom, bool direct, bool no_increase, bool no_decrease)
 {
 	AdjustZoomParameter(&ZoomVal, zoom, no_increase, no_decrease);
 	ZoomToViewports(direct, no_increase, no_decrease);
 }
 
-void C4Player::SetMinZoom(C4Fixed zoom, bool no_increase, bool no_decrease)
+void C4Player::SetMinZoom(C4Real zoom, bool no_increase, bool no_decrease)
 {
 	AdjustZoomParameter(&ZoomLimitMinVal, zoom, no_increase, no_decrease);
 	ZoomLimitsToViewports();
 }
 
-void C4Player::SetMaxZoom(C4Fixed zoom, bool no_increase, bool no_decrease)
+void C4Player::SetMaxZoom(C4Real zoom, bool no_increase, bool no_decrease)
 {
 	AdjustZoomParameter(&ZoomLimitMaxVal, zoom, no_increase, no_decrease);
 	ZoomLimitsToViewports();
@@ -1882,7 +1882,7 @@ bool C4Player::AdjustZoomParameter(int32_t *range_par, int32_t new_val, bool no_
 	return true;
 }
 
-bool C4Player::AdjustZoomParameter(C4Fixed *zoom_par, C4Fixed new_val, bool no_increase, bool no_decrease)
+bool C4Player::AdjustZoomParameter(C4Real *zoom_par, C4Real new_val, bool no_increase, bool no_decrease)
 {
 	// helper function: Adjust *zoom_par to new_val if increase/decrease not forbidden
 	if (new_val < *zoom_par)

src/player/C4Player.h

@@ -112,7 +112,7 @@ class C4Player: public C4PlayerInfoCore
 	int32_t FlashCom; // NoSave //
 	bool fFogOfWar;
 	int32_t ZoomLimitMinWdt,ZoomLimitMinHgt,ZoomLimitMaxWdt,ZoomLimitMaxHgt,ZoomWdt,ZoomHgt; // zoom limits and last zoom set by script
-	C4Fixed ZoomLimitMinVal,ZoomLimitMaxVal,ZoomVal; // direct zoom values. 
+	C4Real ZoomLimitMinVal,ZoomLimitMaxVal,ZoomVal; // direct zoom values. 
 	// Game
 	int32_t Wealth;
 	int32_t CurrentScore,InitialScore;
@@ -254,17 +254,17 @@ class C4Player: public C4PlayerInfoCore
 	void SetZoomByViewRange(int32_t range_wdt, int32_t range_hgt, bool direct, bool no_increase, bool no_decrease);
 	void SetMinZoomByViewRange(int32_t range_wdt, int32_t range_hgt, bool no_increase, bool no_decrease);
 	void SetMaxZoomByViewRange(int32_t range_wdt, int32_t range_hgt, bool no_increase, bool no_decrease);
-	void SetZoom(C4Fixed zoom, bool direct, bool no_increase, bool no_decrease);
-	void SetMinZoom(C4Fixed zoom, bool no_increase, bool no_decrease);
-	void SetMaxZoom(C4Fixed zoom, bool no_increase, bool no_decrease);
+	void SetZoom(C4Real zoom, bool direct, bool no_increase, bool no_decrease);
+	void SetMinZoom(C4Real zoom, bool no_increase, bool no_decrease);
+	void SetMaxZoom(C4Real zoom, bool no_increase, bool no_decrease);
 	void ZoomToViewports(bool direct, bool no_increase=false, bool no_decrease=false);
 	void ZoomToViewport(C4Viewport* vp, bool direct, bool no_increase=false, bool no_decrease=false);
 	void ZoomLimitsToViewports();
 	void ZoomLimitsToViewport(C4Viewport* vp);
 
 private:
 	bool AdjustZoomParameter(int32_t *range_par, int32_t new_val, bool no_increase, bool no_decrease);
-	bool AdjustZoomParameter(C4Fixed *zoom_par, C4Fixed new_val, bool no_increase, bool no_decrease);
+	bool AdjustZoomParameter(C4Real *zoom_par, C4Real new_val, bool no_increase, bool no_decrease);
 
 	// Finds a new gamepad to use, returning true on success.
 	bool FindGamepad();