Fix MEMORY_MANAGER_VICTIM_PERCENTAGE

The calculation was previously done using integers, this lead to
MEMORY_MANAGER_VICTIM_PERCENTAGE to become 0.

emper/Emper.hpp

@@ -291,7 +291,8 @@ const bool CONTEXT_MANAGER_WITH_MEMORY_MANAGER =
 #endif
 		;
 
-constexpr float MEMORY_MANAGER_VICTIM_PERCENTAGE = EMPER_MEMORY_MANAGER_VICTIM_PERCENTAGE / 100;
+constexpr float MEMORY_MANAGER_VICTIM_PERCENTAGE =
+		static_cast<float>(EMPER_MEMORY_MANAGER_VICTIM_PERCENTAGE) / 100;
 static_assert(MEMORY_MANAGER_VICTIM_PERCENTAGE >= 0 && MEMORY_MANAGER_VICTIM_PERCENTAGE <= 1);
 
 const size_t ASSUME_PAGE_SIZE = EMPER_ASSUME_PAGE_SIZE;