more -Wall warning fixes from Cristian Ionescu-Idbohrn.

This time it resulted in small code changes:

function                                             old     new   delta
nexpr                                                820     828      +8
tail_main                                           1200    1202      +2
wrapf                                                166     167      +1
parse_mount_options                                  227     209     -18
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/1 up/down: 11/-18)             Total: -7 bytes

1 files changed, 4 insertions, 4 deletions

diff --git a/libbb/lineedit.c b/libbb/lineedit.c
index d1a7a4bac..62dcc55cd 100644
--- a/libbb/lineedit.c
+++ b/libbb/lineedit.c
@@ -262,7 +262,7 @@ static void input_backward(unsigned num)
                 return;
         cursor -= num;
 
-        if (cmdedit_x >= num) {
+        if ((unsigned)cmdedit_x >= num) {
                 cmdedit_x -= num;
                 if (num <= 4) {
                         /* This is longer by 5 bytes on x86.
@@ -321,7 +321,7 @@ static void input_delete(int save)
 {
         int j = cursor;
 
-        if (j == command_len)
+        if (j == (int)command_len)
                 return;
 
 #if ENABLE_FEATURE_EDITING_VI
@@ -830,7 +830,7 @@ static void input_tab(smallint *lastWasTab)
 
         if (!*lastWasTab) {
                 char *tmp, *tmp1;
-                int len_found;
+                size_t len_found;
 /*              char matchBuf[MAX_LINELEN]; */
 #define matchBuf (S.input_tab__matchBuf)
                 int find_type;
@@ -1787,7 +1787,7 @@ int read_line_input(const char *prompt, char *command, int maxsize, line_input_t
                         if (vi_cmdmode)  /* Don't self-insert */
                                 break;
 #endif
-                        if (command_len >= (maxsize - 2))        /* Need to leave space for enter */
+                        if ((int)command_len >= (maxsize - 2))        /* Need to leave space for enter */
                                 break;
 
                         command_len++;