Fixes C Interface for GetPreEvolution function

CInterface/Library/SpeciesLibrary.cpp

@@ -10,8 +10,10 @@ export u8 PkmnLib_SpeciesLibrary_FindPreEvolution(const PokemonSpecies*& out, co
                                                                      const PokemonSpecies* species) {
     Try(
         auto v = p->FindPreEvolution(species);
-        if (!v.has_value())
+        if (!v.has_value()){
             out = nullptr;
-        out = v.value().GetRaw();
+        } else {
+            out = v.value().GetRaw();
+        }
     )
 }