[PATCH 2/2] Fix clang warnings about GNU old-style field designator

[Antonio Ospite <ao2@xxxxxx>]

Building with clang results in some warnings about the use of GNU
old-style field designators:

-----------------------------------------------------------------------
output.c:86:2: warning: use of GNU old-style field designator extension [-Wgnu-designator]
        nextc: 0, end: 0, buf: 0, bufsize: OUTBUFSIZ, fd: 1, flags: 0
        ^~~~~~
        .nextc =
...
-----------------------------------------------------------------------

Fix the issue bu using C99 initializers instead.

This should be safe and should not introduce any compatibility problems
as it is done already in other parts of the codebase, like
src/expand.c:ccmatch() and src/parser.c::readtoken1().

Signed-off-by: Antonio Ospite <ao2@xxxxxx>
---
 src/output.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/output.c b/src/output.c
index 34243ea..e9ee9b4 100644
--- a/src/output.c
+++ b/src/output.c
@@ -71,27 +71,27 @@
 
 #ifdef USE_GLIBC_STDIO
 struct output output = {
-	stream: 0, nextc: 0, end: 0, buf: 0, bufsize: 0, fd: 1, flags: 0
+	.stream = 0, .nextc = 0, .end = 0, .buf = 0, .bufsize = 0, .fd = 1, .flags = 0
 };
 struct output errout = {
-	stream: 0, nextc: 0, end: 0, buf: 0, bufsize: 0, fd: 2, flags: 0
+	.stream = 0, .nextc = 0, .end = 0, .buf = 0, .bufsize = 0, .fd = 2, .flags = 0
 }
 #ifdef notyet
 struct output memout = {
-	stream: 0, nextc: 0, end: 0, buf: 0, bufsize: 0, fd: MEM_OUT, flags: 0
+	.stream = 0, .nextc = 0, .end = 0, .buf = 0, .bufsize = 0, .fd = MEM_OUT, .flags = 0
 };
 #endif
 #else
 struct output output = {
-	nextc: 0, end: 0, buf: 0, bufsize: OUTBUFSIZ, fd: 1, flags: 0
+	.nextc = 0, .end = 0, .buf = 0, .bufsize = OUTBUFSIZ, .fd = 1, .flags = 0
 };
 struct output errout = {
-	nextc: 0, end: 0, buf: 0, bufsize: 0, fd: 2, flags: 0
+	.nextc = 0, .end = 0, .buf = 0, .bufsize = 0, .fd = 2, .flags = 0
 };
 struct output preverrout;
 #ifdef notyet
 struct output memout = {
-	nextc: 0, end: 0, buf: 0, bufsize: 0, fd: MEM_OUT, flags: 0
+	.nextc = 0, .end = 0, .buf = 0, .bufsize = 0, .fd = MEM_OUT, .flags = 0
 };
 #endif
 #endif
-- 
2.20.0