Peds: Efforts to find the reason of crashes on GCC 7.5.0

* Prevent deleted peds to be in nearPeds list (was always needed, might be unrelated to crashes)
* Add asserts to nearPeds and PedIK ctor (crash reasons)
* Shouldn't fix reported crashes since they were caused by null peds.

src/peds/PedIK.cpp

@@ -17,9 +17,9 @@ const RwV3d XaxisIK = { 1.0f, 0.0f, 0.0f};
 const RwV3d YaxisIK = { 0.0f, 1.0f, 0.0f};
 const RwV3d ZaxisIK = { 0.0f, 0.0f, 1.0f};
 
-CPedIK::CPedIK(CPed *ped)
+CPedIK::CPedIK(CPed *ped) : m_ped(ped)
 {
-	m_ped = ped;
+	assert(ped != nil);
 	m_flags = 0;
 	m_headOrient.yaw = 0.0f;
 	m_headOrient.pitch = 0.0f;