[nasm:master] Fix sigsegv if two outputs specified

[nasm-bot f. C. G. <gor...@gm...>]

Commit-ID:  f5a48a6ba25a4d96d1204e9a2ba9faf246a7de7c
Gitweb:     http://repo.or.cz/w/nasm.git?a=commitdiff;h=f5a48a6ba25a4d96d1204e9a2ba9faf246a7de7c
Author:     Cyrill Gorcunov <gor...@gm...>
AuthorDate: Sat, 24 Nov 2018 12:02:13 +0300
Committer:  Cyrill Gorcunov <gor...@gm...>
CommitDate: Sat, 24 Nov 2018 12:02:13 +0300

Fix sigsegv if two outputs specified

outname is only set up by pass two so
earlier access may lead to sigsegv.

Signed-off-by: Cyrill Gorcunov <gor...@gm...>


---
 asm/nasm.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/asm/nasm.c b/asm/nasm.c
index c7d5e3c..25ac36c 100644
--- a/asm/nasm.c
+++ b/asm/nasm.c
@@ -1743,7 +1743,9 @@ static void nasm_verror_gnu(int severity, const char *fmt, va_list ap)
     if (!(severity & ERR_NOFILE)) {
 	src_get(&lineno, &currentfile);
         if (!currentfile || (severity & ERR_TOPFILE)) {
-            currentfile = inname[0] ? inname : outname[0] ? outname : NULL;
+            currentfile = inname && inname[0] ?
+		    inname : outname && outname[0] ?
+		    outname : NULL;
             lineno = 0;
         }
     }