gnu: libxt: Update to 1.2.0.

* gnu/packages/xorg.scm (libxt): Update to 1.2.0.
* gnu/packages/patches/libxt-guix-search-paths.patch: Adjust for 1.2.0.  While
at it, trim spurious whitespaces.

gnu/packages/patches/libxt-guix-search-paths.patch

@@ -1,17 +1,18 @@
---- libXt-1.1.5/src/Intrinsic.c	2015-05-01 07:36:20.000000000 +0200
-+++ Intrinsic.c	2016-12-12 00:42:16.567388450 +0100
-@@ -1303,21 +1303,101 @@
+diff --git a/src/Intrinsic.c b/src/Intrinsic.c
+index c9624ec..addcdba 100644
+--- a/src/Intrinsic.c
++++ b/src/Intrinsic.c
+@@ -1312,21 +1312,101 @@ static void FillInLangSubs(
      } else (void) strcpy(*rest, string);
  }
  
--/*
++
++
+ /*
 - * default path used if environment variable XFILESEARCHPATH
 - * is not defined.  Also substitued for %D.
 - * The exact value should be documented in the implementation
 - * notes for any Xt implementation.
-+
-+
-+/* 
 +   Return the default search path for the function
 +   XtResolvePathname to use if XFILESEARCHPATH is
 +   not defined.
@@ -20,7 +21,7 @@
 +   prepended with "/run/current-system/profile", and $GUIX_PROFILE and
 +   "$HOME/.guix-profile"
 +
-+   These values provide the default paths where Guix/GuixSD  can expect
++   These values provide the default paths where Guix/GuixSD can expect
 +   to find resources for installed packages.
   */
 -static const char *implementation_default_path(void)
@@ -28,11 +29,6 @@
  {
 -#if defined(WIN32)
 -    static char xfilesearchpath[] = "";
--
--    return xfilesearchpath;
--#else
--    return XFILESEARCHPATHDEFAULT;
--#endif
 +  static const char *search_path_default_stem[] = {
 +    "/lib/X11/%L/%T/%N%C%S",
 +    "/lib/X11/%l/%T/%N%C%S",
@@ -72,7 +68,11 @@
 +      bytesAllocd += SIZEOF_STEMS;
 +      bytesAllocd += 6 * (1 + strlen (guix_profile));
 +    }
-+
+ 
+-    return xfilesearchpath;
+-#else
+-    return XFILESEARCHPATHDEFAULT;
+-#endif
 +  if (home != NULL)
 +    {
 +      bytesAllocd += SIZEOF_STEMS;
@@ -115,12 +115,12 @@
  }
  
  
-@@ -1345,7 +1425,7 @@
+@@ -1354,7 +1434,7 @@ _XtString XtResolvePathname(
  {
      XtPerDisplay pd;
      static const char *defaultPath = NULL;
 -    const char *impl_default = implementation_default_path();
 +    const char *impl_default = guix_default_path();
-     int idef_len = strlen(impl_default);
+     int idef_len = (int) strlen(impl_default);
      char *massagedPath;
      int bytesAllocd, bytesLeft;

gnu/packages/xorg.scm

@@ -5304,7 +5304,7 @@ draggable titlebars and borders.")
 (define-public libxt
   (package
     (name "libxt")
-    (version "1.1.5")
+    (version "1.2.0")
     (source
       (origin
         (method url-fetch)
@@ -5314,7 +5314,7 @@ draggable titlebars and borders.")
                ".tar.bz2"))
         (sha256
           (base32
-           "06lz6i7rbrp19kgikpaz4c97fw7n31k2h2aiikczs482g2zbdvj6"))
+           "0cbqlyssr8aia88c8i7z59z9d0kp3p2hp6683xhz9ndyv8qza7dk"))
         (patches (search-patches "libxt-guix-search-paths.patch"))))
     (build-system gnu-build-system)
     (outputs '("out"