[ Xedra Evolved ] No Mana regen for the dead (CleverRaven#82375)

* No Mana for the dead

Update mutations.json

* Apply suggestions from code review

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

* Update data/mods/Xedra_Evolved/mutations/mutations.json

* Apply suggestions from code review

* Update data/mods/Xedra_Evolved/spells/vampire_spells.json

* Update magic.cpp

* Update data/mods/Xedra_Evolved/mutations/mutations.json

* Astyle

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

* Update src/magic.cpp

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Anton Simakov <67688115+GuardianDll@users.noreply.github.com>

Author: 3 people

data/mods/Xedra_Evolved/mutations/mutations.json

@@ -1178,7 +1178,8 @@
           { "value": "STAMINA_REGEN_MOD", "add": 0.5 },
           { "value": "METABOLISM", "multiply": -0.5 },
           { "value": "DISINFECTANT_BONUS", "multiply": -1 },
-          { "value": "BANDAGE_BONUS", "multiply": -1 }
+          { "value": "BANDAGE_BONUS", "multiply": -1 },
+          { "value": "REGEN_MANA", "multiply": -50 }
         ]
       },
       {

src/magic.cpp

@@ -2682,8 +2682,9 @@ void known_magic::update_mana( const Character &guy, float turns )
     // mana should replenish in 8 hours.
     const double full_replenish = to_turns<double>( 8_hours );
     const double ratio = turns / full_replenish;
-    mod_mana( guy, std::floor( ratio * guy.calculate_by_enchantment( static_cast<double>( max_mana(
-                                   guy ) ), enchant_vals::mod::REGEN_MANA ) ) );
+    mod_mana( guy, std::floor( ratio * std::max( 0.0,
+                               guy.calculate_by_enchantment( static_cast<double>( max_mana(
+                                           guy ) ), enchant_vals::mod::REGEN_MANA ) ) ) );
 }
 
 std::vector<spell_id> known_magic::spells() const