gpg: Initialize a parameter to silence valgrind.

* g10/keygen.c (read_parameter_file): Initialize nline.
* g10/textfilter.c (copy_clearsig_text): Initialize bufsize.
--

In iobuf_read_line the parameter to pass and return the current buffer
length is controlled by the buffer parameter.  Thus there should be no
problem because the assert call check s buffer first.  For yet unknown
reasons when using the standard GNU libc assert valgrind complains
about an uninitialized variable.  That does not happen with our
log_assert.

Tested with gnupg 2.2.23 with gcc 8.3.0 and valgrind 3.14.0.

Signed-off-by: Werner Koch <wk@gnupg.org>

g10/keygen.c

@@ -4308,6 +4308,7 @@ read_parameter_file (ctrl_t ctrl, const char *fname )
     para = NULL;
     maxlen = 1024;
     line = NULL;
+    nline = 0;
     while ( iobuf_read_line (fp, &line, &nline, &maxlen) ) {
 	char *keyword, *value;
 

g10/textfilter.c

@@ -163,8 +163,8 @@ copy_clearsig_text( IOBUF out, IOBUF inp, gcry_md_hd_t md,
 		    int escape_dash, int escape_from)
 {
     unsigned int maxlen;
-    byte *buffer = NULL;    /* malloced buffer */
-    unsigned int bufsize;   /* and size of this buffer */
+    byte *buffer = NULL;      /* malloced buffer */
+    unsigned int bufsize = 0; /* and size of this buffer */
     unsigned int n;
     int truncated = 0;
     int pending_lf = 0;