[PATCH] stubdom: Fix GCC 14 -Wmemset-elt-size compiler warnings in PolarSSL

[Andrew Mbugua <andrewprecious388@xxxxxxxxx>]

When compiling Xen with GCC 14, I get a compiler warning originating from the 
/polarssl-x86_64/library about a memset element size mismatch:

ssl_tls.c: In function ‘ssl_session_reset’:
ssl_tls.c:1778:5: warning: ‘memset’ used with length equal to number of 
elements without multiplication by element size [-Wmemset-elt-size]
1778 |     memset( ssl->ctx_enc, 0, 128 );
|     ^~~~~~
ssl_tls.c:1779:5: warning: ‘memset’ used with length equal to number of 
elements without multiplication by element size [-Wmemset-elt-size]
1779 |     memset( ssl->ctx_dec, 0, 128 );
|     ^~~~~~

This patch introduces a build-time patch to PolarSSL that replaces the 
hardcoded 128 byte length with a dynamic sizeof(), thus allowing clean 
compilation without warnings.

Signed-off-by: Andrew Mbugua <andrewprecious388@xxxxxxxxx>
---
 stubdom/patches/polarssl-gcc14-memset.patch | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 stubdom/patches/polarssl-gcc14-memset.patch

diff --git a/stubdom/patches/polarssl-gcc14-memset.patch 
b/stubdom/patches/polarssl-gcc14-memset.patch
new file mode 100644
index 0000000000..d98664d0a8
--- /dev/null
+++ b/stubdom/patches/polarssl-gcc14-memset.patch
@@ -0,0 +1,13 @@
+--- a/library/ssl_tls.c
++++ b/library/ssl_tls.c
+@@ -1775,8 +1775,8 @@
+     memset( ssl->iv_dec, 0, 16 );
+     memset( ssl->mac_enc, 0, 32 );
+     memset( ssl->mac_dec, 0, 32 );
+-    memset( ssl->ctx_enc, 0, 128 );
+-    memset( ssl->ctx_dec, 0, 128 );
++    memset( ssl->ctx_enc, 0, sizeof( *ssl->ctx_enc) );
++    memset( ssl->ctx_dec, 0, sizeof( *ssl->ctx_dec) );
+ 
+      md5_starts( &ssl->fin_md5  );
+     sha1_starts( &ssl->fin_sha1 );
-- 
2.47.3