Fix memory leak in mpi_core_ct_uint_table_lookup test

Signed-off-by: Janos Follath <janos.follath@arm.com>
diff --git a/tests/suites/test_suite_bignum_core.function b/tests/suites/test_suite_bignum_core.function
index f4fd51c..c0bee70 100644
--- a/tests/suites/test_suite_bignum_core.function
+++ b/tests/suites/test_suite_bignum_core.function
@@ -949,9 +949,9 @@
     size_t count = ( (size_t) 1 ) << window_size;
 
     mbedtls_mpi_uint *table = NULL;
-    ASSERT_ALLOC( table, limbs * count );
-
     mbedtls_mpi_uint *dest = NULL;
+
+    ASSERT_ALLOC( table, limbs * count );
     ASSERT_ALLOC( dest, limbs );
 
     /*
@@ -986,6 +986,7 @@
     }
 
 exit:
-    ;
+    mbedtls_free(table);
+    mbedtls_free(dest);
 }
 /* END_CASE */