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

core/src/fxge/dib/fx_dib_main.cpp

Index: core/src/fxge/dib/fx_dib_main.cpp
diff --git a/core/src/fxge/dib/fx_dib_main.cpp b/core/src/fxge/dib/fx_dib_main.cpp
index f55b2f573741a2eceadd9b3edbc28f8f7759f0ee..a54c9abed045d19c0492d3789e2ee1443270d84b 100644
--- a/core/src/fxge/dib/fx_dib_main.cpp
+++ b/core/src/fxge/dib/fx_dib_main.cpp
@@ -85,12 +85,12 @@ FX_BOOL CFX_DIBitmap::Create(int width, int height, FXDIB_Format format, FX_LPBY
         int oomlimit = _MAX_OOM_LIMIT_;
         if (oomlimit >= 0 && size >= oomlimit) {
             m_pBuffer = FX_TryAlloc(FX_BYTE, size);
-            if (m_pBuffer == NULL) {
-                return FALSE;
-            }
         } else {
             m_pBuffer = FX_Alloc(FX_BYTE, size);
         }
+        if (m_pBuffer == NULL) {
+            return FALSE;
+        }
     }
     m_Width = width;
     m_Height = height;
@@ -202,6 +202,9 @@ void CFX_DIBSource::BuildPalette()
     }
     if (GetBPP() == 1) {
         m_pPalette = FX_Alloc(FX_DWORD, 2);
+        if (!m_pPalette) {
+            return;
+        }
         if(IsCmykImage()) {
             m_pPalette[0] = 0xff;
             m_pPalette[1] = 0;
@@ -211,6 +214,9 @@ void CFX_DIBSource::BuildPalette()
         }
     } else if (GetBPP() == 8) {
         m_pPalette = FX_Alloc(FX_DWORD, 256);
+        if (!m_pPalette) {
+            return;
+        }
         if(IsCmykImage()) {
             for (int i = 0; i < 256; i ++) {
                 m_pPalette[i] = 0xff - i;
@@ -525,6 +531,9 @@ void CFX_DIBSource::CopyPalette(const FX_DWORD* pSrc, FX_DWORD size)
         if (m_pPalette == NULL) {
             m_pPalette = FX_Alloc(FX_DWORD, pal_size);
         }
+        if (!m_pPalette) {
+            return;
+        }
         if (pal_size > size) {
             pal_size = size;
         }