Fixes for wrong C declarations

CInterface/Core.cpp

@@ -1,4 +1,4 @@
 #include "Core.hpp"
 
 std::string ExceptionHandler::_lastException = "";
-export const char* PkmnLib_GetLastException() { return ExceptionHandler::GetLastException(); }
+export const char* PkmnLib_C_GetLastException() { return ExceptionHandler::GetLastException(); }

CInterface/Library/Nature.cpp

@@ -19,6 +19,7 @@ SIMPLE_GET_FUNC(Nature, GetDecreasedStat, CreatureLib::Library::Statistic)
 
 #undef SIMPLE_GET_FUNC
 
-export float PkmnLib_Nature_GetStatModifier(PkmnLib::Library::Nature nature, CreatureLib::Library::Statistic stat) {
-    return nature.GetStatModifier(stat);
+export float PkmnLib_Nature_GetStatModifier(const PkmnLib::Library::Nature* nature,
+                                            CreatureLib::Library::Statistic stat) {
+    return nature->GetStatModifier(stat);
 }