Rename Missile::_mirange to Missile::duration (#7214)

Source/loadsave.cpp

@@ -761,7 +761,7 @@ void LoadMissile(LoadHelper *file)
 	missile._miLightFlag = file->NextBool32();
 	missile._miPreFlag = file->NextBool32();
 	missile._miUniqTrans = file->NextLE<uint32_t>();
-	missile._mirange = file->NextLE<int32_t>();
+	missile.duration = file->NextLE<int32_t>();
 	missile._misource = file->NextLE<int32_t>();
 	missile._micaster = static_cast<mienemy_type>(file->NextLE<int32_t>());
 	missile._midam = file->NextLE<int32_t>();
@@ -1549,7 +1549,7 @@ void SaveMissile(SaveHelper *file, const Missile &missile)
 	file->WriteLE<uint32_t>(missile._miLightFlag ? 1 : 0);
 	file->WriteLE<uint32_t>(missile._miPreFlag ? 1 : 0);
 	file->WriteLE<uint32_t>(missile._miUniqTrans);
-	file->WriteLE<int32_t>(missile._mirange);
+	file->WriteLE<int32_t>(missile.duration);
 	file->WriteLE<int32_t>(missile._misource);
 	file->WriteLE<int32_t>(missile._micaster);
 	file->WriteLE<int32_t>(missile._midam);

Source/missiles.h

@@ -119,7 +119,8 @@ struct Missile {
 	bool _miLightFlag;
 	bool _miPreFlag;
 	uint32_t _miUniqTrans;
-	int _mirange; // Time to live for the missile in game ticks, oncs 0 the missile will be marked for deletion via _miDelFlag
+	/** @brief Time to live for the missile in game ticks; once 0, the missile will be marked for deletion via _miDelFlag */
+	int duration;
 	int _misource;
 	mienemy_type _micaster;
 	int _midam;

test/fixtures/memory_map/missile.txt

@@ -27,7 +27,7 @@ R 32 _miDrawFlag
 R 32 _miLightFlag
 R 32 _miPreFlag
 R 32 _miUniqTrans
-R 32 _mirange
+R 32 duration
 R 32 _misource
 R 32 _micaster
 R 32 _midam