fix a few linux compilation warnings

core/src/fxge/ge/fx_ge_fontmap.cpp

Index: core/src/fxge/ge/fx_ge_fontmap.cpp
diff --git a/core/src/fxge/ge/fx_ge_fontmap.cpp b/core/src/fxge/ge/fx_ge_fontmap.cpp
index 22c399150d6d3a2ac629937938a144e5928eb610..28770301b94279fc6995b1edb90fe5b11df0eb9d 100644
--- a/core/src/fxge/ge/fx_ge_fontmap.cpp
+++ b/core/src/fxge/ge/fx_ge_fontmap.cpp
@@ -748,19 +748,6 @@ FX_DWORD _GetCodePageRangeFromCharset(int charset)
     }
     return 1 << 21;
 }
-static int CP2CharSet(int cp)
-{
-    if(cp == 932) {
-        return FXFONT_SHIFTJIS_CHARSET;
-    } else if(cp == 936) {
-        return FXFONT_GB2312_CHARSET;
-    } else if(cp == 949) {
-        return FXFONT_HANGEUL_CHARSET;
-    } else if(cp == 950) {
-        return FXFONT_CHINESEBIG5_CHARSET;
-    }
-    return FXFONT_DEFAULT_CHARSET;
-}
 FXFT_Face CFX_FontMapper::UseInternalSubst(CFX_SubstFont* pSubstFont, int iBaseFont, int italic_angle, int weight, int picthfamily)
 {
     if (iBaseFont < 12) {
@@ -1389,6 +1376,7 @@ void CFX_FolderFontInfo::ScanFile(CFX_ByteString& path)
     FX_BYTE buffer[16];
     FXSYS_fseek(pFile, 0, FXSYS_SEEK_SET);
     size_t readCnt = FXSYS_fread(buffer, 12, 1, pFile);

[jun_fang, 2015/01/17 00:39:17]

suggest to check whether readCnt equals to 12.

+    // TODO(tsepez): File bug, reading from a file less than 12 bytes gives UMR.
     if (GET_TT_LONG(buffer) == 0x74746366) {
         FX_DWORD nFaces = GET_TT_LONG(buffer + 8);
         FX_LPBYTE offsets = FX_Alloc(FX_BYTE, nFaces * 4);