The big NULL replacement party part 3.

Getting there I think.

src/RageSurface_Load.cpp

@@ -26,7 +26,7 @@ static RageSurface *TryOpenFile( RString sPath, bool bHeaderOnly, RString &error
 	{
 		error = "Unsupported format";
 		bKeepTrying = true;
-		return NULL;
+		return nullptr;
 	}
 
 	if( result == RageSurfaceUtils::OPEN_OK )
@@ -70,7 +70,7 @@ static RageSurface *TryOpenFile( RString sPath, bool bHeaderOnly, RString &error
 		default: break;
 	}
 
-	return NULL;
+	return nullptr;
 }
 
 RageSurface *RageSurfaceUtils::LoadFile( const RString &sPath, RString &error, bool bHeaderOnly )
@@ -80,7 +80,7 @@ RageSurface *RageSurfaceUtils::LoadFile( const RString &sPath, RString &error, b
 		if( !TestOpen.Open( sPath ) )
 		{
 			error = TestOpen.GetError();
-			return NULL;
+			return nullptr;
 		}
 	}
 
@@ -115,7 +115,7 @@ RageSurface *RageSurfaceUtils::LoadFile( const RString &sPath, RString &error, b
 		}
 	}
 
-	return NULL;
+	return nullptr;
 }
 
 /*