Fix _setmode usage for stdout new-line conversion

The previous fix didn't work in all situations. I suspect it's because
it was changing the state of the fd back to _O_TEXT mode without
synchronising with fflush(). Changing the mode back to _O_TEXT isn't
actually needed (see discussion in #56,) so just remove the call.

src/zopfli/zopfli_bin.c

@@ -112,17 +112,13 @@ static void CompressFile(const ZopfliOptions* options,
     SaveFile(outfilename, out, outsize);
   } else {
     size_t i;
-/* Windows workaround for stdout output. */
 #if _WIN32
+    /* Windows workaround for stdout output. */
     _setmode(_fileno(stdout), _O_BINARY);
 #endif
     for (i = 0; i < outsize; i++) {
-      /* Works only if terminal does not convert newlines. */
       printf("%c", out[i]);
     }
-#if _WIN32
-    _setmode(_fileno(stdout), _O_TEXT);
-#endif
   }
 
   free(out);