Fix argument for tprintf

This fixes a gcc warning:

ccutil/tprintf.h:31:50: warning:
 format ‘%d’ expects argument of type ‘int’,
 but argument 2 has type ‘tesseract::ScoredFont’ [-Wformat=]

Signed-off-by: Stefan Weil <sw@weilnetz.de>

classify/shapeclassifier.cpp

@@ -179,7 +179,7 @@ void ShapeClassifier::UnicharPrintResults(
     if (results[i].fonts.size() != 0) {
       tprintf(" Font Vector:");
       for (int f = 0; f < results[i].fonts.size(); ++f) {
-        tprintf(" %d", results[i].fonts[f]);
+        tprintf(" %d", results[i].fonts[f].fontinfo_id);
       }
     }
     tprintf("\n");