Fix gcc warning -Wmissing-field-initializers

The approach that was taken here was to add default values to the type
definitions rather than specify them whenever they are missing.

Now the only remaining warning is '-Wunused-parameter' which @jade said
is usually counterproductive and that we can just disable it:
https://git.lix.systems/lix-project/lix/issues/456#issuecomment-6617

So this change adds the flags '-Wall', '-Wextra' and
'-Wno-unused-parameter', so that all warnings are enabled except for
'-Wunused-parameter'.

Change-Id: Ic223a964d67ab429e8da804c0721ba5e25d53012

1 files changed, 3 insertions, 3 deletions

diff --git a/src/libutil/error.hh b/src/libutil/error.hh
index 4eff2c2bc..885a2b218 100644
--- a/src/libutil/error.hh
+++ b/src/libutil/error.hh
@@ -70,17 +70,17 @@ inline bool operator<=(const Trace& lhs, const Trace& rhs);
 inline bool operator>=(const Trace& lhs, const Trace& rhs);
 
 struct ErrorInfo {
-    Verbosity level;
+    Verbosity level = Verbosity::lvlError;
     HintFmt msg;
     std::shared_ptr<Pos> pos;
-    std::list<Trace> traces;
+    std::list<Trace> traces = {};
 
     /**
      * Exit status.
      */
     unsigned int status = 1;
 
-    Suggestions suggestions;
+    Suggestions suggestions = {};
 
     static std::optional<std::string> programName;
 };