[freetype2] master 5b1a37a: Fix for CFF space glyph regression (#57541).

[Werner LEMBERG]

branch: master
commit 5b1a37af563349172230842fcfdb59b5f22afcd0
Author: Dominik Röttsches <address@hidden>
Commit: Werner Lemberg <address@hidden>

    Fix for CFF space glyph regression (#57541).
    
    * src/psaux/psft.c (cf2_decoder_parse_substrings): Replace early-out
      with FT_OFFSET.
---
 ChangeLog        | 7 +++++++
 src/psaux/psft.c | 5 +----
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index ad34231..a0d747c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2020-02-25  Dominik Röttsches  <address@hidden>
+
+       Fix for CFF space glyph regression (#57541).
+
+       * src/psaux/psft.c (cf2_decoder_parse_substrings): Replace early-out
+         with FT_OFFSET.
+
 2020-02-22  Werner Lemberg  <address@hidden>
 
        [woff2] Fix font table access.
diff --git a/src/psaux/psft.c b/src/psaux/psft.c
index 08dd33c..50b40bf 100644
--- a/src/psaux/psft.c
+++ b/src/psaux/psft.c
@@ -316,9 +316,6 @@
     FT_Bool  is_t1 = decoder->builder.is_t1;
 
 
-    if ( !charstring_base || !charstring_len )
-      return FT_ERR( Invalid_File_Format );
-
     FT_ASSERT( decoder &&
                ( is_t1 || decoder->cff ) );
 
@@ -388,7 +385,7 @@
       FT_ZERO( &buf );
       buf.start =
       buf.ptr   = charstring_base;
-      buf.end   = charstring_base + charstring_len;
+      buf.end   = FT_OFFSET( charstring_base, charstring_len );
 
       FT_ZERO( &transform );