gnu: potrace: Update to 1.16.

* gnu/packages/patches/potrace-tests.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Adjust accordingly.
* gnu/packages/fontutils.scm (potrace): Update to 1.16.
[source](patches): Remove.

gnu/local.mk

@@ -1319,7 +1319,6 @@ dist_patch_DATA =						\
   %D%/packages/patches/portaudio-audacity-compat.patch		\
   %D%/packages/patches/portmidi-modular-build.patch		\
   %D%/packages/patches/postgresql-disable-resolve_symlinks.patch	\
-  %D%/packages/patches/potrace-tests.patch			\
   %D%/packages/patches/procmail-ambiguous-getline-debian.patch  \
   %D%/packages/patches/procmail-CVE-2014-3618.patch		\
   %D%/packages/patches/procmail-CVE-2017-16844.patch		\

gnu/packages/fontutils.scm

@@ -468,7 +468,7 @@ and returns a sequence of positioned glyphids from the font.")
 (define-public potrace
   (package
     (name "potrace")
-    (version "1.15")
+    (version "1.16")
     (source
      (origin
       (method url-fetch)
@@ -476,8 +476,7 @@ and returns a sequence of positioned glyphids from the font.")
                           "/potrace-" version ".tar.gz"))
       (sha256
        (base32
-        "17ajildjp14shsy339xarh1lw1p0k60la08ahl638a73mh23kcx9"))
+        "1k3sxgjqq0jnpk9xxys05q32sl5hbf1lbk1gmfxcrmpdgnhli0my"))))
-      (patches (search-patches "potrace-tests.patch"))))
     (build-system gnu-build-system)
     (native-inputs `(("ghostscript" ,ghostscript))) ;for tests
     (inputs `(("zlib" ,zlib)))

gnu/packages/patches/potrace-tests.patch

@@ -1,50 +0,0 @@
-This relaxes the comparison threshold between the reference data
-and the bitmaps produced by Ghostscript interpreting the vectorized
-image.  Apparently the threshold has become too low with the switch
-to from Ghostscript 2.21 to 2.22.
-
---- potrace-1.15/check/postscript-check.sh	2018-01-06 19:47:26.194900686 +0100
-+++ potrace-1.15/check/postscript-check.sh	2018-01-06 19:51:35.937503739 +0100
-@@ -70,15 +70,15 @@ if test $? -ne 0; then
-     echo "Something is wrong with $GS; skipping this test" >& 2
-     exit 77
- fi 
--actiondiff "$TMP2" "$REFDATA" 1000
-+actiondiff "$TMP2" "$REFDATA" 1500
- 
- action $POTRACE -r50 -p -L 0 -B 0 --opaque -o "$TMP1" "$DATA"
- action "$GS" -q -dNOPAUSE -sDEVICE=pbmraw -g460x394 -r100x100 -sOutputFile="$TMP2" -- "$TMP1"
--actiondiff "$TMP2" "$REFDATA" 1200
-+actiondiff "$TMP2" "$REFDATA" 1500
- 
- action $POTRACE -r50 -p -L 0 -B 0 -A 160 -o "$TMP1" "$DATA"
- action "$GS" -q -dNOPAUSE -sDEVICE=pbmraw -g568x528 -r100x100 -sOutputFile="$TMP2" -- "$TMP1"
--actiondiff "$TMP2" "$REFDATAROT" 1200
-+actiondiff "$TMP2" "$REFDATAROT" 1500
- 
- action rm -f "$TMP1"
- action rm -f "$TMP2"
-
---- potrace-1.15/check/pdf-check.sh	2018-01-06 19:47:28.698886663 +0100
-+++ potrace-1.15/check/pdf-check.sh	2018-01-06 20:54:14.895460329 +0100
-@@ -72,15 +72,15 @@ if test $? -ne 0 -o ! -f "$TMP2"; then
-     echo "GS does not understand PDF; skipping this test" >& 2
-     exit 77
- fi 
--actiondiff "$TMP2" "$REFDATA" 1000
-+actiondiff "$TMP2" "$REFDATA" 1500
- 
- action $POTRACE -r50 -p -L 0 -B 0 --opaque -b pdf -o "$TMP1" "$DATA"
- action "$GS" -q -dNOPAUSE -sDEVICE=pbmraw -g460x394 -r100x100 -sOutputFile="$TMP2" -- "$TMP1"
--actiondiff "$TMP2" "$REFDATA" 1200
-+actiondiff "$TMP2" "$REFDATA" 1500
- 
- action $POTRACE -r50 -p -L 0 -B 0 -A 160 -b pdf -o "$TMP1" "$DATA"
- action "$GS" -q -dNOPAUSE -sDEVICE=pbmraw -g568x528 -r100x100 -sOutputFile="$TMP2" -- "$TMP1"
--actiondiff "$TMP2" "$REFDATAROT" 1200
-+actiondiff "$TMP2" "$REFDATAROT" 1500
- 
- action rm -f "$TMP1"
- action rm -f "$TMP2"
-
-Diff finished.  Sat Jan  6 20:54:50 2018