Modernize various files (src/m*) (#6267)

* Modernize various files (src/m*)

* range-based for loops
* code style
* C++ headers instead of C headers
* Default operators
* empty function

Thanks to clang-tidy

1 files changed, 1 insertions, 1 deletions

diff --git a/src/mapgen.h b/src/mapgen.h
index 8a9b8057e..6701cfdd0 100644
--- a/src/mapgen.h
+++ b/src/mapgen.h
@@ -122,7 +122,7 @@ enum MapgenType {
 };
 
 struct MapgenParams {
-	MapgenParams() {}
+	MapgenParams() = default;
 	virtual ~MapgenParams();
 
 	MapgenType mgtype = MAPGEN_DEFAULT;