Update tmalign.py for python 3.11

[danpf]

Currently with OSX python3.11 (m1) I get a nasty crash (segment below) because python3.11 calls pyfloat_fromdouble on an integer. changing them to floats fixes the crash.

System Integrity Protection: enabled

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       KERN_INVALID_ADDRESS at 0x0000000000000010
Exception Codes:       0x0000000000000001, 0x0000000000000010

Termination Reason:    Namespace SIGNAL, Code 11 Segmentation fault: 11
Terminating Process:   exc handler [30753]

VM Region Info: 0x10 is not in any region.  Bytes before following region: 105553518919664
      REGION TYPE                    START - END         [ VSIZE] PRT/MAX SHRMOD  REGION DETAIL
      UNUSED SPACE AT START
--->  
      MALLOC_NANO (reserved)   600018000000-600020000000 [128.0M] rw-/rwx SM=NUL  ...(unallocated)

Thread 0 Crashed::  Dispatch queue: com.apple.main-thread
0   python3.11                             0x102fcc364 PyFloat_FromDouble + 32
1   python3.11                             0x102fca5c8 PyFloat_AsDouble + 256
2   python3.11                             0x102fca5c8 PyFloat_AsDouble + 256
3   _cmd.cpython-311-darwin.so             0x104260d4c PConvPyListToFloatArrayInPlace(_object*, float*, unsigned long) + 140
4   _cmd.cpython-311-darwin.so             0x1044226a4 CmdTransformSelection(_object*, _object*) + 468
5   python3.11                             0x102ffe2e4 cfunction_call + 284
6   python3.11                             0x102fa78c4 _PyObject_MakeTpCall + 332
7   python3.11                             0x1030a433c _PyEval_EvalFrameDefault + 46132
8   python3.11                             0x1030a88c0 _PyEval_Vector + 184 

[speleo3]

I don't really understand this crash, CPython should be fine with the int -> float conversion. I wonder if it's the side effect of something else going wrong.

Either way, your change looks good.