Revert "Remove FX_Alloc() null checks now that it can't return NULL."

core/src/fxcrt/extension.h

Index: core/src/fxcrt/extension.h
diff --git a/core/src/fxcrt/extension.h b/core/src/fxcrt/extension.h
index c459bdcf99609e37ba11c3c2fff4dcf30808b44d..dbee7e676a2c9ab9bcc88cbbfe52302cc42f074c 100644
--- a/core/src/fxcrt/extension.h
+++ b/core/src/fxcrt/extension.h
@@ -348,7 +348,9 @@ public:
         if (m_dwFlags & FX_MEMSTREAM_Consecutive) {
             if (m_Blocks.GetSize() < 1) {
                 FX_LPBYTE pBlock = FX_Alloc(FX_BYTE, FX_MAX(nInitSize, 4096));
-                m_Blocks.Add(pBlock);
+                if (pBlock) {
+                    m_Blocks.Add(pBlock);
+                }
             }
             m_nGrowSize = FX_MAX(nGrowSize, 4096);
         } else if (m_Blocks.GetSize() < 1) {
@@ -405,6 +407,9 @@ protected:
         m_Blocks.SetSize(m_Blocks.GetSize() + (FX_INT32)size);
         while (size --) {
             FX_LPBYTE pBlock = FX_Alloc(FX_BYTE, m_nGrowSize);
+            if (!pBlock) {
+                return FALSE;
+            }
             m_Blocks.SetAt(iCount ++, pBlock);
             m_nTotalSize += m_nGrowSize;
         }