Codechange: do not declare functions in blocks

src/saveload/afterload.cpp

@@ -2941,7 +2941,6 @@ bool AfterLoadGame()
 				RoadVehicle *u = v;
 				RoadVehicle *prev = nullptr;
 				for (uint sf : skip_frames) {
-					extern bool IndividualRoadVehicleController(RoadVehicle *v, const RoadVehicle *prev);
 					if (sf >= cur_skip) IndividualRoadVehicleController(u, prev);
 
 					prev = u;

src/saveload/saveload.cpp

@@ -367,6 +367,8 @@ void NORETURN SlErrorCorrupt(const char *msg)
 	SlError(STR_GAME_SAVELOAD_ERROR_BROKEN_SAVEGAME, msg);
 }
 
+void NORETURN SlErrorCorruptFmt(const char *format, ...) WARN_FORMAT(1, 2);
+
 /**
  * Issue an SlErrorCorrupt with a format string.
  * @param format format string

src/saveload/saveload.h

@@ -1134,7 +1134,6 @@ std::vector<SaveLoad> SlCompatTableHeader(const SaveLoadTable &slt, const SaveLo
 void SlObject(void *object, const SaveLoadTable &slt);
 void NORETURN SlError(StringID string, const char *extra_msg = nullptr);
 void NORETURN SlErrorCorrupt(const char *msg);
-void NORETURN SlErrorCorruptFmt(const char *format, ...) WARN_FORMAT(1, 2);
 
 bool SaveloadCrashWithMissingNewGRFs();