_mesa_clone_program: Copy ShadowSamplers
diff --git a/src/mesa/shader/program.c b/src/mesa/shader/program.c
index 7048770..376d7ee6 100644
--- a/src/mesa/shader/program.c
+++ b/src/mesa/shader/program.c
@@ -437,6 +437,7 @@
    clone->InputsRead = prog->InputsRead;
    clone->OutputsWritten = prog->OutputsWritten;
    clone->SamplersUsed = prog->SamplersUsed;
+   clone->ShadowSamplers = prog->ShadowSamplers;
    memcpy(clone->TexturesUsed, prog->TexturesUsed, sizeof(prog->TexturesUsed));
 
    if (prog->Parameters)