don't reuse old var remnants

Change-Id: I1074d0431695ec21e22cdef334dbe419763e7ba2

filter/source/graphicfilter/ios2met/ios2met.cxx

@@ -773,20 +773,18 @@ Color OS2METReader::GetPaletteColor(sal_uInt32 nIndex)
                  sal::static_int_cast< sal_uInt8 >(nIndex&0xff));
 }
 
-
 sal_uInt16 OS2METReader::ReadBigEndianWord()
 {
-    sal_uInt8 nLo,nHi;
+    sal_uInt8 nLo(0), nHi(0);
     pOS2MET->ReadUChar( nHi ).ReadUChar( nLo );
     return (((sal_uInt16)nHi)<<8)|(((sal_uInt16)nLo)&0x00ff);
 }
 
 sal_uLong OS2METReader::ReadBigEndian3BytesLong()
 {
-    sal_uInt16 nLo;
-    sal_uInt8 nHi;
+    sal_uInt8 nHi(0);
     pOS2MET->ReadUChar( nHi );
-    nLo=ReadBigEndianWord();
+    sal_uInt16 nLo = ReadBigEndianWord();
     return ((((sal_uLong)nHi)<<16)&0x00ff0000)|((sal_uLong)nLo);
 }
 
@@ -2563,10 +2561,7 @@ void OS2METReader::ReadField(sal_uInt16 nFieldType, sal_uInt16 nFieldSize)
 
 void OS2METReader::ReadOS2MET( SvStream & rStreamOS2MET, GDIMetaFile & rGDIMetaFile )
 {
-    sal_uInt16 nFieldSize;
-    sal_uInt16 nFieldType;
     sal_uLong nPercent, nLastPercent;
-    sal_uInt8 nMagicByte;
 
     ErrorCode=0;
 
@@ -2632,6 +2627,7 @@ void OS2METReader::ReadOS2MET( SvStream & rStreamOS2MET, GDIMetaFile & rGDIMetaF
 
     sal_uInt64 const nStartPos = pOS2MET->Tell();
     sal_uInt64 const nRemaining = pOS2MET->remainingSize();
+
     Callback(0); nLastPercent=0;
 
     sal_uInt64 nPos = pOS2MET->Tell();
@@ -2644,15 +2640,17 @@ void OS2METReader::ReadOS2MET( SvStream & rStreamOS2MET, GDIMetaFile & rGDIMetaF
             nLastPercent=nPercent;
         }
 
-        nFieldSize=ReadBigEndianWord();
-
+        sal_uInt16 nFieldSize = ReadBigEndianWord();
+        sal_uInt8 nMagicByte(0);
         pOS2MET->ReadUChar( nMagicByte );
         if (nMagicByte!=0xd3) {
             pOS2MET->SetError(SVSTREAM_FILEFORMAT_ERROR);
             ErrorCode=7;
             break;
         }
-        pOS2MET->ReadUInt16( nFieldType );
+
+        sal_uInt16 nFieldType(0);
+        pOS2MET->ReadUInt16(nFieldType);
 
         pOS2MET->SeekRel(3);
         nPos+=8; nFieldSize-=8;