Fix a bug from my function pointer change
diff --git a/src/bc/bc.c b/src/bc/bc.c
index 76da687..0913566 100644
--- a/src/bc/bc.c
+++ b/src/bc/bc.c
@@ -117,7 +117,7 @@
     if (status != BC_STATUS_LEX_EOF) goto err;
 
     // Make sure to execute the math library.
-    status = bc_program_exec(&vm.program);
+    status = vm.exec(&vm.program);
 
     if (status) goto err;
   }