SF #1444030: Fix several potential defects found by Coverity.
(reviewed by Neal Norwitz)
diff --git a/Parser/firstsets.c b/Parser/firstsets.c
index fcd9ffd..0f4e09d 100644
--- a/Parser/firstsets.c
+++ b/Parser/firstsets.c
@@ -107,4 +107,6 @@
 		}
 		printf(" }\n");
 	}
+
+	PyMem_FREE(sym);
 }