fix some build problems

src/landscape/fow/C4FoWLightSection.cpp

@@ -7,6 +7,8 @@
 #include "C4Landscape.h"
 #include "C4DrawGL.h"
 
+#include "float.h"
+
 // Gives the point where the line through (x1,y1) and (x2,y2) crosses through the line
 // through (x3,y3) and (x4,y4)
 bool find_cross(float x1, float y1, float x2, float y2,

src/landscape/fow/C4FoWLightSection.h

@@ -1,11 +1,9 @@
-
 #ifndef C4FOWLIGHTSECTION_H
 #define C4FOWLIGHTSECTION_H
 
 #include "C4Rect.h"
-#include "C4Surface.h"
+#include "C4FoWLight.h"
 
-class C4FoWLight;
 class C4FoWRegion;
 class C4FoWRay;
 
@@ -40,7 +38,7 @@ public:
 	/** Update all light rays within the given rectangle */
 	void Update(C4Rect r);
 
-	void Render(C4FoWRegion *pRegion, const C4TargetFacet *pOnScreen = NULL);
+	void Render(C4FoWRegion *pRegion, const class C4TargetFacet *pOnScreen = NULL);
 
 	/** Shorten all light rays to the given reach.
 	    Called when the size of the light has decreased to the given value */

src/landscape/fow/C4FoWRay.h

@@ -1,5 +1,5 @@
-#ifndef C4FOW_H
-#define C4FOW_H
+#ifndef C4FOWRAY_H
+#define C4FOWRAY_H
 
 #include "StdBuf.h"