Fix compilation on windows

data/font.h

@@ -1,11 +1,11 @@
 #pragma once
 #define FONT_H 12
 #ifndef FONTEDITOR
-extern unsigned char font_data[];
-extern unsigned short font_ptrs[];
-extern unsigned int font_ranges[][2];
+extern const unsigned char font_data[];
+extern const unsigned short font_ptrs[];
+extern const unsigned int font_ranges[][2];
 #else
-extern unsigned char *font_data;
-extern unsigned short *font_ptrs;
-extern unsigned int (*font_ranges)[2];
+extern const unsigned char *font_data;
+extern const unsigned short *font_ptrs;
+extern const unsigned int (*font_ranges)[2];
 #endif

src/graphics/Font.h → src/graphics/FontReader.h

@@ -1,23 +1,24 @@
+#pragma once
 #include <cstddef>
 
 #include "common/String.h"
 #include "font.h"
 
 class FontReader
 {
-	unsigned char *pointer;
+	unsigned char const *pointer;
 	int width;
 	int pixels;
 	int data;
 
-	inline FontReader(unsigned char *_pointer):
+	inline FontReader(unsigned char const *_pointer):
 		pointer(_pointer + 1),
 		width(*_pointer),
 		pixels(0),
 		data(0)
 	{}
 
-	static inline unsigned char *lookupChar(String::value_type ch)
+	static inline unsigned char const *lookupChar(String::value_type ch)
 	{
 		size_t offset = 0;
 		for(int i = 0; font_ranges[i][1]; i++)

src/graphics/Graphics.cpp

@@ -5,7 +5,7 @@
 #include "Config.h"
 #include "Misc.h"
 #include "Graphics.h"
-#include "Font.h"
+#include "FontReader.h"
 #ifdef HIGH_QUALITY_RESAMPLE
 #include "resampler/resampler.h"
 #endif

src/graphics/OpenGLGraphics.cpp

@@ -1,5 +1,5 @@
 #include "Graphics.h"
-#include "Font.h"
+#include "FontReader.h"
 #include "common/tpt-thread.h"
 #ifdef OGLI
 

src/graphics/RasterDrawMethods.inl

@@ -1,5 +1,5 @@
 #include <cmath>
-#include "Font.h"
+#include "FontReader.h"
 
 int PIXELMETHODS_CLASS::drawtext_outline(int x, int y, String s, int r, int g, int b, int a)
 {