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

core/src/fxge/win32/fx_win32_dib.cpp

Index: core/src/fxge/win32/fx_win32_dib.cpp
diff --git a/core/src/fxge/win32/fx_win32_dib.cpp b/core/src/fxge/win32/fx_win32_dib.cpp
index 46abdb366c8f99688566e26bcc5f42b26d534b64..ec523c39c1dba6c2184d6249e70b2385c4b6b89f 100644
--- a/core/src/fxge/win32/fx_win32_dib.cpp
+++ b/core/src/fxge/win32/fx_win32_dib.cpp
@@ -69,6 +69,12 @@ CFX_DIBitmap* _FX_WindowsDIB_LoadFromBuf(BITMAPINFO* pbmi, LPVOID pData, FX_BOOL
     FXSYS_memcpy32(pBitmap->GetBuffer(), pData, pitch * height);
     if (bBottomUp) {
         FX_LPBYTE temp_buf = FX_Alloc(FX_BYTE, pitch);
+        if (!temp_buf) {
+            if (pBitmap) {
+                delete pBitmap;
+            }
+            return NULL;
+        }
         int top = 0, bottom = height - 1;
         while (top < bottom) {
             FXSYS_memcpy32(temp_buf, pBitmap->GetBuffer() + top * pitch, pitch);
@@ -197,6 +203,13 @@ CFX_DIBitmap* CFX_WindowsDIB::LoadFromDDB(HDC hDC, HBITMAP hBitmap, FX_DWORD* pP
             size += sizeof (FX_DWORD) * 254;
         }
         BITMAPINFO* pbmih = (BITMAPINFO*)FX_Alloc(FX_BYTE, size);
+        if (!pbmih) {
+            delete pDIBitmap;
+            if (bCreatedDC) {
+                DeleteDC(hDC);
+            }
+            return NULL;
+        }
         pbmih->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
         pbmih->bmiHeader.biBitCount = bmih.biBitCount;
         pbmih->bmiHeader.biCompression = BI_RGB;