File VFlib3-compare-always-false.patch of Package VFlib3

#! /bin/sh /usr/share/dpatch/dpatch-run
## 03_comparison_always_false.dpatch by Matej Vela <vela@debian.org>
##
## All lines beginning with `## DP:' are a description of the patch.
## DP: Fix `comparison is always false' warnings on platforms where char
## DP: is unsigned by default (this might lead to infinite loops).

@DPATCH@
diff -urNad vflib3-3.6.13~/src/sexp.c vflib3-3.6.13/src/sexp.c
--- vflib3-3.6.13~/src/sexp.c
+++ vflib3-3.6.13/src/sexp.c
@@ -707,7 +707,7 @@
 
 
 static int  vf_sexp_do_read_from_stream(SEXP_STREAM stream, SEXP sexp);
-static int  vf_sexp_read_str(SEXP_STREAM stream, char ch, SEXP sexp);
+static int  vf_sexp_read_str(SEXP_STREAM stream, int ch, SEXP sexp);
 static int  vf_sexp_skip(SEXP_STREAM stream);
 static char vf_get_char_esc(char **pp, SEXP_STREAM stream);
 #define  NBUFFER_MIN    2*1024
@@ -787,7 +787,7 @@
 }
 
 static int
-vf_sexp_read_str(SEXP_STREAM stream, char ch, SEXP s)
+vf_sexp_read_str(SEXP_STREAM stream, int ch, SEXP s)
 {
   char         tmp[8];
   int          ch1, dq_str;