Fix more code which has shadow variables

core/fxcodec/lgif/fx_gif.cpp

Index: core/fxcodec/lgif/fx_gif.cpp
diff --git a/core/fxcodec/lgif/fx_gif.cpp b/core/fxcodec/lgif/fx_gif.cpp
index 53298c831a7c74742204c49208832538b81030e3..b0df32973dd1b81979c6e8a508d29be3a05ff598 100644
--- a/core/fxcodec/lgif/fx_gif.cpp
+++ b/core/fxcodec/lgif/fx_gif.cpp
@@ -334,13 +334,13 @@ FX_BOOL CGifLZWEncoder::Encode(const uint8_t* src_buf,
 }
 FX_BOOL CGifLZWEncoder::LookUpInTable(const uint8_t* buf,
                                       uint32_t& offset,
-                                      uint8_t& bit_offset) {
+                                      uint8_t& out_bit_offset) {
   for (uint16_t i = table_cur; i < index_num; i++) {
     if (code_table[i].prefix == code_table[index_num].prefix &&
         code_table[i].suffix == code_table[index_num].suffix) {
       code_table[index_num].prefix = i;
       code_table[index_num].suffix =
-          gif_cut_buf(buf, offset, src_bit_cut, bit_offset, src_bit_num);
+          gif_cut_buf(buf, offset, src_bit_cut, out_bit_offset, src_bit_num);
       table_cur = i;
       return TRUE;
     }