Locations in dumps of compiled code blocks are off by one

[tsutton]

Describe the bug

When boa is printing a compiled CodeBlock, the locations printed correspond to the location of the wrong instruction (they are the following instruction, not the current instruction)

To Reproduce

// bug.js
if (false){
    1;
} else{
    0;
}

Then run cargo run -- -t bug.js:

...
----------------------Compiled Output: '<main>'-----------------------
Location  Count   Opcode                     Operands

000001    0000    PushFalse
000006    0001    JumpIfFalse                19
000011    0002    PushDeclarativeEnvironment 0
000012    0003    PushOne
000013    0004    Pop
000014    0005    PopEnvironment
000019    0006    Jump                       27
000024    0007    PushDeclarativeEnvironment 0
000025    0008    PushZero
000026    0009    Pop
000027    0010    PopEnvironment
...

Expected behavior
In this output, you can see a few weird things:

1. The first instruction is at location 1, not 0
2. The Jump operands don't line up printed Locations - the first JumpIfFalse has operand 19, but the instruction listed at location 19 is another Jump.

Build environment (please complete the following information):

• OS: Windows
• Version: 0.14 (on the latest main as of writing)
• Target triple: x86_64-pc-windows-msvc
• Rustc version: rustc 1.59.0 (9d1b2106e 2022-02-23)