Fix `cmap` Subtable Format 4 `entrySelector`

https://docs.microsoft.com/en-us/typography/opentype/spec/cmap defines
`entrySelector` as "Log2 of the maximum power of 2 less than or equal to
numTables (log2(searchRange/2), which is equal to floor(log2(segCount)))"

Part-of: <https://gitlab.freedesktop.org/xorg/app/fonttosfnt/-/merge_requests/17>

1 files changed, 1 insertions, 1 deletions

diff --git a/write.c b/write.c
index 223a431..b1397ff 100644
--- a/write.c
+++ b/write.c
@@ -875,7 +875,7 @@ writecmap(FILE* out, FontPtr font)
     /* How baroque can you get? */
     writeUSHORT(out, segcount * 2); /* segCountX2 */
     writeUSHORT(out, 2 * two_log2_floor(segcount)); /* searchRange */
-    writeUSHORT(out, 1 + log2_floor(segcount));   /* entrySelector */
+    writeUSHORT(out, log2_floor(segcount));   /* entrySelector */
     writeUSHORT(out, 2 * (segcount - two_log2_floor(segcount)));   
                                 /* rangeShift */