Fix Meson warnings that might indicate misconfiguration

Signed-off-by: Simon McVittie <smcv@collabora.com>

debian/changelog

@@ -10,6 +10,9 @@ systemd (237-3ubuntu10.13+steamrt2.1) UNRELEASED; urgency=medium
   * d/p/steamrt/journal-adapt-for-new-improved-LZ4_decompress_safe_partia.patch:
     Backport patch from upstream to fix build-time test failure with
     newer liblz4
+  * d/p/steamrt/meson-avoid-warning-about-comparison-of-bool-and-string.patch:
+    Backport patch from upstream to fix Meson warnings that might indicate
+    misconfiguration
 
  -- Simon McVittie <smcv@collabora.com>  Wed, 27 Feb 2019 17:03:51 +0000
 

debian/patches/series

@@ -99,3 +99,4 @@ journal-do-not-remove-multiple-spaces-after-identifi.patch
 steamrt/meson-use-array-type-option.patch
 steamrt/meson-rename-Ddebug-to-Ddebug-extra.patch
 steamrt/journal-adapt-for-new-improved-LZ4_decompress_safe_partia.patch
+steamrt/meson-avoid-warning-about-comparison-of-bool-and-string.patch

debian/patches/steamrt/meson-avoid-warning-about-comparison-of-bool-and-string.patch

+From: =?utf-8?q?Zbigniew_J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
+Date: Fri, 9 Mar 2018 14:21:08 +0100
+Subject: meson: avoid warning about comparison of bool and string
+
+meson.build:2907: WARNING: Trying to compare values of different types (bool, str) using ==.
+The result of this is undefined and will become a hard error in a future Meson release.
+
+Origin: upstream, commit:af4d7860c4e757f34a02ca73a0b14c73c18f8b30
+---
+ meson.build | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+diff --git a/meson.build b/meson.build
+index 81dd902..efc1c6a 100644
+--- a/meson.build
++++ b/meson.build
+@@ -2854,8 +2854,9 @@ foreach tuple : [
+         ['debug mmap cache'],
+ ]
+ 
+-        cond = tuple.get(1, '')
+-        if cond == ''
++        if tuple.length() >= 2
++                cond = tuple[1]
++        else
+                 ident1 = 'HAVE_' + tuple[0].underscorify().to_upper()
+                 ident2 = 'ENABLE_' + tuple[0].underscorify().to_upper()
+                 cond = conf.get(ident1, 0) == 1 or conf.get(ident2, 0) == 1