Small fix to annotations crash (#2346)

* Small fix to remove crash in specific cases - when we generate an annotation on an instruction detected to change the program counter (which sometimes happens, like an add instruction where the pc is the target in Arm)

* fix for real

pwndbg/color/disasm.py

@@ -134,7 +134,8 @@ def instructions_and_padding(instructions: List[PwndbgInstruction]) -> List[str]
 
     # Final pass to apply final paddings to make alignment of blocks of instructions cleaner
     for i, (ins, asm, padding) in enumerate(zip(instructions, result, paddings)):
-        if ins.annotation:
+        # Padding being None implies a jump target - this is already baked into "asm"
+        if ins.annotation and padding is not None:
             asm = f"{ljust_colored(asm, padding)}{ins.annotation}"
 
         final_result.append(asm)