Fix pushbytes == [] check

Author: lucidLuckylee

src/lib.rs

@@ -192,7 +192,7 @@ pub fn define_pushable(_: TokenStream) -> TokenStream {
                     Some(instr_result) => match instr_result {
                         Ok(instr) => match instr {
                             bitcoin::script::Instruction::PushBytes(push_bytes) => {
-                                if push_bytes.as_bytes() == [] {
+                                if push_bytes.len() == 0 {
                                     check_optimality(::bitcoin::opcodes::all::OP_PUSHBYTES_0, opcode, file, line)
                                 }
                             },
@@ -231,7 +231,7 @@ pub fn define_pushable(_: TokenStream) -> TokenStream {
                             bitcoin::script::Instruction::PushBytes(push_bytes) => {
                                 // Seperately handle OP_0 because it is turned into a PushBytes
                                 // struct in the Script instruction
-                                if push_bytes.as_bytes() == [] {
+                                if push_bytes.len() == 0 {
                                     Some((index, ::bitcoin::opcodes::all::OP_PUSHBYTES_0))
                                 } else {
                                     None

src/parse.rs

@@ -164,7 +164,7 @@ where
                                     Some(instr_result) => match instr_result {
                                         Ok(instr) => match instr {
                                             bitcoin::script::Instruction::PushBytes(push_bytes) => {
-                                                if push_bytes.as_bytes() == [] {
+                                                if push_bytes.len() == 0 {
                                                     pushable::check_optimality(previous_opcode, ::bitcoin::opcodes::all::OP_PUSHBYTES_0, file!(), line!())
                                                 }
                                             },
@@ -180,7 +180,7 @@ where
                                 Some(instr_result) => match instr_result {
                                     Ok(instr) => match instr {
                                         bitcoin::script::Instruction::PushBytes(push_bytes) => {
-                                            if push_bytes.as_bytes() == [] {
+                                            if push_bytes.len() == 0 {
                                                 last_opcode = Some(::bitcoin::opcodes::all::OP_PUSHBYTES_0);
                                             }
                                         },