fix: ispaused invalid iterator

Author: maxime1907

core/sourcehook/sourcehook_impl.h

@@ -256,8 +256,19 @@ namespace SourceHook
 
 			ICleanupTask *m_CleanupTask;
 
+			bool isValidIterator(std::list<Item>& myList, std::list<Item>::iterator it) {
+				for (auto iter = myList.begin(); iter != myList.end(); ++iter) {
+					if (iter == it) {
+						return true;
+					}
+				}
+				return false;
+			}
+
 			void SkipPaused(List<CHook>::iterator &iter, List<CHook> &list)
 			{
+				if (!iter || !isValidIterator(iter))
+					iter = list.begin();
 				while (iter != list.end() && iter->IsPaused())
 					++iter;
 			}