reorder fortran header for opts struct, fixes #593

Author: ahbarnett

include/finufft.fh

@@ -1,12 +1,21 @@
 c     Fortran header recreating finufft_opts struct in fortran (f90 style).
 c     This must be kept synchronized with finufft_opts.h, matching its order.
-c     Also see ../fortran/finufftfort.cpp.  Barnett 5/29/20. One prec 7/2/20.
+c     Also see ../fortran/finufftfort.cpp.
+c     Barnett 5/29/20. One prec 7/2/20. Fix ordering bug 11/29/24.
 
       type finufft_opts
-         integer debug, spread_debug,spread_sort,spread_kerevalmeth,
-     $        spread_kerpad,chkbnds,fftw,modeord
-         real*8 upsampfac
-         integer spread_thread,maxbatchsize,showwarn,nthreads,
-     $        spread_nthr_atomic,spread_max_sp_size
-         integer fftw_lock_fun,fftw_unlock_fun,fftw_lock_data
+
+c     data handling opts...
+      integer modeord,chkbnds
+
+c     diagnostic opts...
+      integer debug,spread_debug,showwarn
+
+c     alg performance opts...
+      integer nthreads,fftw,spread_sort,spread_kerevalmeth,spread_kerpad
+      real*8 upsampfac
+      integer spread_thread,maxbatchsize,spread_nthr_atomic,
+     $ spread_max_sp_size
+      integer fftw_lock_fun,fftw_unlock_fun,fftw_lock_data
+
       end type