diagnostics: fix memory leak in libtextstyle

[Akim Demaille]

commit 79f7afb125445d71faba47e3cb1a55102a9a07a3
Author: Akim Demaille <address@hidden>
Date:   Mon Apr 15 07:37:55 2019 +0200

    diagnostics: fix memory leak in libtextstyle
    
    * src/complain.h, src/complain.c (complain_free): New.
    * src/main.c: Use it.

diff --git a/src/complain.c b/src/complain.c
index b0daa4a9..97af2f95 100644
--- a/src/complain.c
+++ b/src/complain.c
@@ -278,6 +278,12 @@ complain_init (void)
     }
 }
 
+void
+complain_free (void)
+{
+  caret_free ();
+  styled_ostream_free (errstream);
+}
 
 /* A diagnostic with FLAGS is about to be issued.  With what severity?
    (severity_fatal, severity_error, severity_disabled, or
diff --git a/src/complain.h b/src/complain.h
index c136c071..199f388d 100644
--- a/src/complain.h
+++ b/src/complain.h
@@ -90,6 +90,9 @@ void warnings_argmatch (char *args);
 /** Initialize this module.  */
 void complain_init (void);
 
+/** Reclaim resources.  */
+void complain_free (void);
+
 /** Initialize support for colored messages.  */
 void complain_init_color (void);
 
diff --git a/src/main.c b/src/main.c
index f0337b15..8b48ad27 100644
--- a/src/main.c
+++ b/src/main.c
@@ -234,8 +234,6 @@ main (int argc, char *argv[])
   timevar_stop (tv_total);
   timevar_print (stderr);
 
-  caret_free ();
-
   /* Fix input file now, even if there are errors: that's less
      warnings in the following runs.  */
   if (!fixits_empty ())
@@ -249,5 +247,7 @@ main (int argc, char *argv[])
     }
   uniqstrs_free ();
 
+  complain_free ();
+
   return complaint_status ? EXIT_FAILURE : EXIT_SUCCESS;
 }