make it compile under the latest mingw64 environment

[teclabat]

• Problem: The parameter name select in functions dgees_ and zgees_ conflicted with the Windows select() system call
• Fix: Renamed the parameter from select to select_fn in:
  • Function declarations in clapack_cutdown.h:19-20
  • Function definitions in clapack_cutdown.c:8518,8870
  • All usages in clapack_cutdown.c:8720,8832,9065

2. Old K&R style function pointer type

• Problem: The L_fp typedef used old K&R style () which modern gcc treats as "zero parameters"
• Fix: Added explicit casts when calling the function pointer:
  • clapack_cutdown.c:8720: Cast to (logical ()(doublereal, doublereal*))
  • clapack_cutdown.c:8832: Cast to (logical ()(doublereal, doublereal*))
  • clapack_cutdown.c:9065: Cast to (logical ()(doublecomplex))