base: prevent instantiation of several static-only classes.

src/audio.h

@@ -26,6 +26,9 @@ class Audio
 {
 public:
     static void Setup(int channels);
+
+private:
+    Audio() {}
 };
 
 } /* namespace lol */

src/forge.h

@@ -28,6 +28,9 @@ public:
     static int Register(char const *path);
     static void Deregister(int id);
     static Font *GetFont(int id);
+
+private:
+    Forge() {}
 };
 
 } /* namespace lol */

src/platform.h

@@ -26,6 +26,9 @@ class Platform
 {
 public:
     static int GetMouseCount();
+
+private:
+    Platform() {}
 };
 
 } /* namespace lol */

src/profiler.h

@@ -48,6 +48,9 @@ public:
     static void Stop(int id);
     static float GetAvg(int id);
     static float GetMax(int id);
+
+private:
+    Profiler() {}
 };
 
 } /* namespace lol */

src/ticker.h

@@ -45,6 +45,9 @@ public:
 
     static void Shutdown();
     static int Finished();
+
+private:
+    Ticker() {}
 };
 
 } /* namespace lol */

src/tiler.h

@@ -29,6 +29,9 @@ class Tiler
 public:
     static TileSet *Register(char const *path, ivec2 size, ivec2 count);
     static void Deregister(TileSet *);
+
+private:
+    Tiler() {}
 };
 
 } /* namespace lol */