dont find entities which are marked for deletion

was leading to vscript crashes in a typical while find entity loop especially if ran every tick. entity would be marked for deletion and deemed invalid with IsValid function, but the find function would resurrect it in the same tick, then trying to use the resurrected handle shortly afterwards would crash the game. Also now doing Destroy in the typical while find loop is fine

Author: jhh8

src/game/server/entitylist.cpp

@@ -599,6 +599,9 @@ CBaseEntity *CGlobalEntityList::FindEntityByClassname( CBaseEntity *pStartEntity
 			continue;
 		}
 
+		if ( pEntity->IsMarkedForDeletion() )
+			continue;
+
 		if ( pEntity->ClassMatches(szName) )
 			return pEntity;
 	}
@@ -727,6 +730,9 @@ CBaseEntity *CGlobalEntityList::FindEntityByName( CBaseEntity *pStartEntity, con
 			continue;
 		}
 
+		if ( ent->IsMarkedForDeletion() )
+			continue;
+
 		if ( !ent->m_iName.Get() )
 			continue;
 
@@ -788,6 +794,9 @@ CBaseEntity *CGlobalEntityList::FindEntityByModel( CBaseEntity *pStartEntity, co
 			continue;
 		}
 
+		if ( ent->IsMarkedForDeletion() )
+			continue;
+
 		if ( !ent->edict() || !ent->GetModelName() )
 			continue;
 
@@ -818,6 +827,9 @@ CBaseEntity	*CGlobalEntityList::FindEntityByTarget( CBaseEntity *pStartEntity, c
 			continue;
 		}
 
+		if ( ent->IsMarkedForDeletion() )
+			continue;
+
 		if ( !ent->m_target )
 			continue;
 
@@ -890,6 +902,9 @@ CBaseEntity *CGlobalEntityList::FindEntityInSphere( CBaseEntity *pStartEntity, c
 			continue;
 		}
 
+		if ( ent->IsMarkedForDeletion() )
+			continue;
+
 		if ( !ent->edict() )
 			continue;