Merge to XFA: Add safe FX_Alloc2D() macro

core/include/fxcrt/fx_basic.h

Index: core/include/fxcrt/fx_basic.h
diff --git a/core/include/fxcrt/fx_basic.h b/core/include/fxcrt/fx_basic.h
index de80ea7f7a84570dfe7b8e81cfc14b9dddc5b514..7c25b237ad6e68bcc8144320479995e86765fec0 100644
--- a/core/include/fxcrt/fx_basic.h
+++ b/core/include/fxcrt/fx_basic.h
@@ -1463,10 +1463,7 @@ public:
         while (nCount > 0) {
             FX_INT32 temp_count = FX_MIN(nCount, FX_DATALIST_LENGTH);
             DataList list;
-            list.data = FX_Alloc(FX_BYTE, temp_count * unit);
-            if (!list.data) {
-                break;
-            }
+            list.data = FX_Alloc2D(FX_BYTE, temp_count, unit);
             list.start = nStart;
             list.count = temp_count;
             Append(list);