Fixed crash with array initialization syntax going out of range (#698)

src/CBot/CBotInstr/CBotListArray.cpp

@@ -152,6 +152,12 @@ bool CBotListArray::Execute(CBotStack* &pj, CBotVar* pVar)
 
         pVar2 = pVar->GetItem(n, true);
 
+        if (pVar2 == nullptr)
+        {
+            pj->SetError(CBotErrOutArray, p->GetToken());
+            return false;
+        }
+
         if (!p->Execute(pile1, pVar2)) return false;        // evaluate expression
 
         pile1->IncState();

src/CBot/CBotVar/CBotVar.h

@@ -415,7 +415,7 @@ public:
      *
      * \param index Index of the element to get
      * \param grow true to grow the array automatically if the index is out of range
-     * \return CBotVar representing the array element
+     * \return CBotVar representing the array element, or nullptr on error (for example going out of range)
      */
     virtual CBotVar* GetItem(int index, bool grow = false);