[Patch] Change to exit(0) for --help-format

[Seth Troisi <braintwo@gmail.com>]

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exit(0) if --help-format <fmt> is found (or all).
continue to exit(1) if fmt is not found.

This is my first patch, let me know what I can do to make this happen.
Thanks,
Seth

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From 61fafa760a32f9ec1b096ff92ed4f39c1f9d95e7 Mon Sep 17 00:00:00 2001
From: Seth Troisi <sethtroisi@google.com>
Date: Thu, 12 Dec 2019 17:16:44 -0800
Subject: [PATCH] Change exit to 0 for --help-format <fmt> if fmt is found

---
 src/sox.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/sox.c b/src/sox.c
index 15f0df67..b5a827fc 100644
--- a/src/sox.c
+++ b/src/sox.c
@@ -2133,6 +2133,7 @@ static void usage_format(char const * name)
     if (!(f = sox_find_format(name, sox_false))) {
       printf("Cannot find a format called `%s'.\n", name);
       display_supported_formats();
+      exit(1);
     }
     else usage_format1(f);
   }
@@ -2143,7 +2144,7 @@ static void usage_format(char const * name)
         usage_format1(f);
     }
   }
-  exit(1);
+  exit(0);
 }
 
 static void read_comment_file(sox_comments_t * comments, char const * const filename)
-- 
2.24.1.735.g03f4e72817-goog


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