Fix BZ2 size

Fix BZ2 size

src/core/fex/fex/BZ2_Inflater.cpp

@@ -173,6 +173,7 @@ blargg_err_t BZ2_Inflater::read( void* out, int* count_io )
 			{
 				unsigned int old_avail_in = (unsigned int)zbuf.avail_in;
 				int err = BZ2_bzDecompress( &zbuf );
+
 				if ( err == BZ_STREAM_END )
 				{
 					remain = zbuf.avail_out;

src/core/fex/fex/BZ2_Reader.cpp

@@ -65,9 +65,11 @@ blargg_err_t BZ2_Reader::read_v( void* out, int count )
 	int actual = count;
 	RETURN_ERR( inflater.read( out, &actual ) );
 
-	if ( actual < count )
+    if ( actual > count ) {
+        size_ = actual;
         set_remain(0);
-	
+    }
+
 	return blargg_ok;
 }