Fix a few compiler warnings.
diff --git a/py/compile.c b/py/compile.c
index ea0bbc2..42bac7d 100644
--- a/py/compile.c
+++ b/py/compile.c
@@ -1610,7 +1610,7 @@
 
         EMIT(pop_top);
 
-        int l3;
+        int l3 = 0;
         if (qstr_exception_local != 0) {
             l3 = comp_next_label(comp);
             EMIT(setup_finally, l3);