Drop 32-bit support; fix arm64

DESCRIPTION

@@ -1,7 +1,7 @@
 Package: unrtf
 Type: Package
 Title: Extract Text from Rich Text Format (RTF) Documents
-Version: 1.4.4
+Version: 1.4.5
 Authors@R: c(
     person("Jeroen", "Ooms", ,"jeroen@berkeley.edu", role = c("aut", "cre")),
     person("Free Software Foundation, Inc", role = "cph"))

R/unrtf.R

@@ -46,8 +46,7 @@ unrtf <- function(file = NULL, format = c("html", "text", "latex"), verbose = FA
   bindir <- system.file("bin", package = "unrtf")
   sharedir <- system.file("share", package = "unrtf")
   setwd(bindir)
-  postfix <- if(is_windows()) .Machine$sizeof.pointer * 8
-  path <- file.path(bindir, paste0("unrtf", postfix))
+  path <- file.path(bindir, "unrtf")
   outcon <- rawConnection(raw(0), "r+")
   on.exit(close(outcon), add = TRUE)
   if(verbose)

src/Makevars

@@ -6,7 +6,7 @@ LIBUNRTF = \
 	libunrtf/malloc.o	libunrtf/my_iconv.o libunrtf/output.o libunrtf/parse.o libunrtf/path.o \
 	libunrtf/unicode.o libunrtf/user.o libunrtf/util.o libunrtf/word.o
 
-UNRTF = unrtf$(WIN)
+UNRTF = unrtf
 
 # Workaround for MacOS R 4.0 harding pcre2
 SYSLIBS = $(subst -lpcre2-8,,$(LIBS))