more of -Wall fixes from Cristian Ionescu-Idbohrn.

Some are fixing real bugs.

function                                             old     new   delta
syslogd_main                                         938     958     +20
get_signum                                           136     143      +7
obj_load                                             777     782      +5
recv_from_to                                         210     214      +4
get_next_block                                      1795    1799      +4
display_topmem_process_list                         1117    1121      +4
logread_main                                         484     487      +3
buffer_fill_and_print                                 73      76      +3
kill_main                                            687     689      +2
ll_remember_index                                    240     241      +1
do_stats                                             452     453      +1
if_readconf                                          166     165      -1
display_process_list                                1192    1191      -1
run_applet_and_exit                                  507     505      -2
print_signames                                        33      31      -2
parse_one_line                                      1092    1090      -2
find_out_spec                                         57      55      -2
add_ksymoops_symbols                                 421     419      -2
ash_main                                            1407    1402      -5
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 11/8 up/down: 54/-17)            Total: 37 bytes

4 files changed, 9 insertions, 8 deletions

diff --git a/libbb/appletlib.c b/libbb/appletlib.c
index 9fe0cf9..3d5aef8 100644
--- a/libbb/appletlib.c
+++ b/libbb/appletlib.c
@@ -598,7 +598,7 @@ static void install_links(const char *busybox, int use_symbolic_links)
 
 	int (*lf)(const char *, const char *);
 	char *fpc;
-	int i;
+	unsigned i;
 	int rc;
 
 	lf = link;
diff --git a/libbb/lineedit.c b/libbb/lineedit.c
index 62dcc55..9c802a3 100644
--- a/libbb/lineedit.c
+++ b/libbb/lineedit.c
@@ -199,7 +199,7 @@ static void cmdedit_set_out_char(int next_char)
 	{
 		bb_putchar(c);
 	}
-	if (++cmdedit_x >= cmdedit_termw) {
+	if (++cmdedit_x >= (int)cmdedit_termw) {
 		/* terminal is scrolled down */
 		cmdedit_y++;
 		cmdedit_x = 0;
@@ -861,7 +861,8 @@ static void input_tab(smallint *lastWasTab)
 			exe_n_cwd_tab_completion(matchBuf, find_type);
 		/* Sort, then remove any duplicates found */
 		if (matches) {
-			int i, n = 0;
+			unsigned i;
+			int n = 0;
 			qsort_string_vector(matches, num_matches);
 			for (i = 0; i < num_matches - 1; ++i) {
 				if (matches[i] && matches[i+1]) { /* paranoia */
diff --git a/libbb/u_signal_names.c b/libbb/u_signal_names.c
index 7a0f75d..1dcbf5f 100644
--- a/libbb/u_signal_names.c
+++ b/libbb/u_signal_names.c
@@ -123,14 +123,14 @@ static const char signals[][7] = {
 
 int get_signum(const char *name)
 {
-	int i;
+	unsigned i;
 
 	i = bb_strtou(name, NULL, 10);
 	if (!errno)
 		return i;
 	if (strncasecmp(name, "SIG", 3) == 0)
 		name += 3;
-	for (i = 0; (size_t)i < ARRAY_SIZE(signals); i++)
+	for (i = 0; i < ARRAY_SIZE(signals); i++)
 		if (strcasecmp(name, signals[i]) == 0)
 			return i;
 
@@ -170,9 +170,9 @@ const char *get_signame(int number)
 
 void print_signames(void)
 {
-	int signo;
+	unsigned signo;
 
-	for (signo = 1; (size_t)signo < ARRAY_SIZE(signals); signo++) {
+	for (signo = 1; signo < ARRAY_SIZE(signals); signo++) {
 		const char *name = signals[signo];
 		if (name[0])
 			puts(name);
diff --git a/libbb/udp_io.c b/libbb/udp_io.c
index e968ecb..689c39a 100644
--- a/libbb/udp_io.c
+++ b/libbb/udp_io.c
@@ -113,7 +113,7 @@ recv_from_to(int fd, void *buf, size_t len, int flags,
 	} u;
 	struct cmsghdr *cmsgptr;
 	struct msghdr msg;
-	socklen_t recv_length;
+	ssize_t recv_length;
 
 	iov[0].iov_base = buf;
 	iov[0].iov_len = len;