flamenco, program: fix new authority log

Author: topointon-jump

contrib/test/test-vectors-commit-sha.txt

@@ -1 +1 @@
-50a43157201d0aff1fa70babe616712efaf58ea7
+9ed535ed2c9cb125525748f6f7e0613cabfaa7c4

src/flamenco/runtime/program/fd_bpf_loader_program.c

@@ -1746,7 +1746,11 @@ process_loader_upgradeable_instruction( fd_exec_instr_ctx_t * instr_ctx ) {
       }
 
       /* Max msg_sz: 16 - 2 + 45 = 59 < 127 => we can use printf */
-      fd_log_collector_printf_dangerous_max_127( instr_ctx, "New authority %s", FD_BASE58_ENC_32_ALLOCA( new_authority ) );
+      if( new_authority ) {
+        fd_log_collector_printf_dangerous_max_127( instr_ctx, "New authority Some(%s)", FD_BASE58_ENC_32_ALLOCA( new_authority ) );
+      } else {
+        fd_log_collector_printf_dangerous_max_127( instr_ctx, "New authority None" );
+      }
 
       /* implicit drop of account */