jscript: Added a few missing allocation checks (Coverity).

dlls/jscript/array.c

@@ -744,9 +744,13 @@ static HRESULT ArrayConstr_value(DispatchEx *dispex, LCID lcid, WORD flags, DISP
 
 static HRESULT alloc_array(script_ctx_t *ctx, BOOL use_constr, ArrayInstance **ret)
 {
-    ArrayInstance *array = heap_alloc_zero(sizeof(ArrayInstance));
+    ArrayInstance *array;
     HRESULT hres;
 
+    array = heap_alloc_zero(sizeof(ArrayInstance));
+    if(!array)
+        return E_OUTOFMEMORY;
+
     if(use_constr)
         hres = init_dispex_from_constr(&array->dispex, ctx, &Array_info, ctx->array_constr);
     else

dlls/jscript/jscript.c

@@ -758,6 +758,8 @@ HRESULT WINAPI JScriptFactory_CreateInstance(IClassFactory *iface, IUnknown *pUn
     lock_module();
 
     ret = heap_alloc_zero(sizeof(*ret));
+    if(!ret)
+        return E_OUTOFMEMORY;
 
     ret->lpIActiveScriptVtbl                 = &JScriptVtbl;
     ret->lpIActiveScriptParseVtbl            = &JScriptParseVtbl;

dlls/jscript/number.c

@@ -231,9 +231,13 @@ static HRESULT NumberConstr_value(DispatchEx *dispex, LCID lcid, WORD flags, DIS
 
 static HRESULT alloc_number(script_ctx_t *ctx, BOOL use_constr, NumberInstance **ret)
 {
-    NumberInstance *number = heap_alloc_zero(sizeof(NumberInstance));
+    NumberInstance *number;
     HRESULT hres;
 
+    number = heap_alloc_zero(sizeof(NumberInstance));
+    if(!number)
+        return E_OUTOFMEMORY;
+
     if(use_constr)
         hres = init_dispex_from_constr(&number->dispex, ctx, &Number_info, ctx->number_constr);
     else