Fix prev_op

Assigning prev_op inside nwp_execute defeated the purpose because this
function is meant to start the state machine for the given instruction.

In other words, inspecting prev_op would in fact return the current
opcode, instead of the previous opcode.

1 files changed, 1 insertions, 1 deletions

diff --git a/include/nanowasm/private.h b/include/nanowasm/private.h
index d42023f..6b134f1 100644
--- a/include/nanowasm/private.h
+++ b/include/nanowasm/private.h
@@ -106,7 +106,7 @@ struct nw_frame
     struct nw_fn fn;
     struct nw_return prev_ret;
     int child;
-    unsigned char prev_op;
+    unsigned char op, prev_op;
     size_t fr_start, local_start, local_end;
     long start, pc;
 };