hush: probably fixing a bug in last LINENO fix

I don't have an example of mishandled script, but the logic looked wrong:
it could sometimes treat newlines as if they are spaces.

function                                             old     new   delta
parse_stream                                        2788    2787      -1

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 6 insertions, 11 deletions

diff --git a/shell/hush.c b/shell/hush.c
index f2ffcf54d..8f1017e3c 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -5019,18 +5019,13 @@ static struct pipe *parse_stream(char **pstring,
  * i.e., at the previous line.
  * We need to skip all whitespace before newlines.
  */
-                        if (ch != '\n') {
-                                /* It was whitespace, but not a newline.
-                                 * Eat all whitespace.
-                                 */
-                                for (;;) {
-                                        next = i_peek(input);
-                                        if (next != ' ' && next != '\t' && next != '\n')
-                                                break; /* next char is not ws */
-                                        ch = i_getch(input);
-                                }
-                                /* ch == last eaten whitespace char */
+                        while (ch != '\n') {
+                                next = i_peek(input);
+                                if (next != ' ' && next != '\t' && next != '\n')
+                                        break; /* next char is not ws */
+                                ch = i_getch(input);
                         }
+                        /* ch == last eaten whitespace char */
 #endif
                         if (done_word(&dest, &ctx)) {
                                 goto parse_error;