fixed a ridiculous number of gcc warnings, nearly all of which were complaints about unused parameters - the remaining 199 warnings I get are from code that isn't ours (box2d is responsible for all but 8 of them)

src/modules/graphics/opengl/Graphics.cpp

@@ -38,7 +38,8 @@ namespace opengl
 		currentMode.height = 0;
 
 		// Window should be centered.
-		SDL_putenv("SDL_VIDEO_CENTERED=center");
+		char * center = "SDL_VIDEO_CENTERED=center";
+		SDL_putenv(center);
 
 		if(SDL_InitSubSystem(SDL_INIT_VIDEO) < 0)
 			throw Exception(SDL_GetError());
@@ -423,7 +424,7 @@ namespace opengl
 		return font;
 	}
 
-	Font * Graphics::newImageFont(Image * image, const char * glyphs, float spacing)
+	Font * Graphics::newImageFont(Image * image, const char * glyphs, float)
 	{
 		Font * font = new ImageFont(image, std::string(glyphs));
 

src/modules/graphics/opengl/wrap_Graphics.cpp

@@ -58,19 +58,19 @@ namespace opengl
 		return 1;
 	}
 
-	int w_reset(lua_State * L)
+	int w_reset(lua_State *)
 	{
 		instance->reset();
 		return 0;
 	}
 
-	int w_clear(lua_State * L)
+	int w_clear(lua_State *)
 	{
 		instance->clear();
 		return 0;
 	}
 
-	int w_present(lua_State * L)
+	int w_present(lua_State *)
 	{
 		instance->present();
 		return 0;
@@ -748,13 +748,13 @@ namespace opengl
 		return instance->polygon(L);
 	}
 
-	int w_push(lua_State * L)
+	int w_push(lua_State *)
 	{
 		instance->push();
 		return 0;
 	}
 
-	int w_pop(lua_State * L)
+	int w_pop(lua_State *)
 	{
 		instance->pop();
 		return 0;