Conditional branch in emulator is incorrect

[mnemonikr]

The conditional branch in the emulator reads the least significant bit of the byte specified to determine whether or not to branch.

symbolic-pcode/crates/pcode/src/emulator.rs

Line 479 in 09edfef

condition: memory.read_bit(&instruction.inputs[1])?.try_into().ok(),

However, the specification for CBRANCH states:

This is a conditional branch instruction where the dynamic condition for taking the branch is determined by the 1 byte variable input1. If this variable is non-zero, the condition is considered true and the branch is taken. [emph. added]

Therefore this check should be updated to compare the byte to the zero byte.