fix a few linux compilation warnings

core/src/fxge/dib/fx_dib_convert.cpp

Index: core/src/fxge/dib/fx_dib_convert.cpp
diff --git a/core/src/fxge/dib/fx_dib_convert.cpp b/core/src/fxge/dib/fx_dib_convert.cpp
index ddc24cc4ad3979633d1f1e954a64482d0edfbf38..5a23ab8d212fb4e6a0757c654ecffccad3497818 100644
--- a/core/src/fxge/dib/fx_dib_convert.cpp
+++ b/core/src/fxge/dib/fx_dib_convert.cpp
@@ -585,10 +585,6 @@ inline FX_BOOL _ConvertBuffer_Rgb2PltRgb8_NoTransform(FX_LPBYTE dest_buf, int de
 FX_BOOL _ConvertBuffer_Rgb2PltRgb8(FX_LPBYTE dest_buf, int dest_pitch, int width, int height,
                                    const CFX_DIBSource* pSrcBitmap, int src_left, int src_top, FX_DWORD* dst_plt, void* pIccTransform)
 {
-    ICodec_IccModule* pIccModule = NULL;
-    if (pIccTransform) {
-        pIccModule = CFX_GEModule::Get()->GetCodecModule()->GetIccModule();
-    }
     FX_BOOL ret = _ConvertBuffer_Rgb2PltRgb8_NoTransform(dest_buf, dest_pitch, width, height, pSrcBitmap, src_left, src_top, dst_plt);
     if (ret && pIccTransform) {
         ICodec_IccModule* pIccModule = CFX_GEModule::Get()->GetCodecModule()->GetIccModule();