Properly export all lua-facing functions and use those for initialization (love.cpp no longer explicitly mentions implementations)

src/modules/font/freetype/wrap_Font.cpp

@@ -79,7 +79,7 @@ namespace freetype
 		0
 	};
 
-	int luaopen_love_font(lua_State * L)
+	extern "C" int luaopen_love_font(lua_State * L)
 	{
 		if (instance == 0)
 		{

src/modules/font/wrap_GlyphData.cpp

@@ -35,7 +35,7 @@ namespace font
 		{ 0, 0 }
 	};
 
-	int luaopen_glyphdata(lua_State * L)
+	extern "C" int luaopen_glyphdata(lua_State * L)
 	{
 		return luax_register_type(L, "GlyphData", functions);
 	}

src/modules/font/wrap_GlyphData.h

@@ -32,7 +32,7 @@ namespace love
 namespace font
 {
 	GlyphData * luax_checkglyphdata(lua_State * L, int idx);
-	int luaopen_glyphdata(lua_State * L);
+	extern "C" int luaopen_glyphdata(lua_State * L);
 
 } // font
 } // love

src/modules/font/wrap_Rasterizer.cpp

@@ -35,7 +35,7 @@ namespace font
 		{ 0, 0 }
 	};
 
-	int luaopen_rasterizer(lua_State * L)
+	extern "C" int luaopen_rasterizer(lua_State * L)
 	{
 		return luax_register_type(L, "Rasterizer", functions);
 	}

src/modules/font/wrap_Rasterizer.h

@@ -30,7 +30,7 @@ namespace love
 namespace font
 {
 	Rasterizer * luax_checkrasterizer(lua_State * L, int idx);
-	int luaopen_rasterizer(lua_State * L);
+	extern "C" int luaopen_rasterizer(lua_State * L);
 
 } // font
 } // love