[Replicant] [libsamsung-ipc] [PATCH 2/3] rfs: fix sign comparison

[Denis 'GNUtoo' Carikli]

Without that fix, when building libsamsung-ipc under GNU/Linux
with the "-Werror -W -Wall -Wunused -Wunused-function" CFLAGS,
GCC and the autotools build system, we have:
    samsung-ipc/rfs.c:115:17: error: comparison of integers
    of different signs:
    '__off_t' (aka 'long') and 'unsigned int' [-Werror,-Wsign-compare]
        if (st.st_size < 2 * sizeof(char) * MD5_DIGEST_LENGTH) {
            ~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    samsung-ipc/rfs.c:176:17: error: comparison of integers
    of different signs:
    '__off_t' (aka 'long') and 'unsigned int' [-Werror,-Wsign-compare]
            if (st.st_size < 2 * sizeof(char) * MD5_DIGEST_LENGTH) {
                ~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    2 errors generated.
    samsung-ipc/rfs.c:115:17: error: comparison of integers
    of different signs:
    '__off_t' (aka 'long') and 'unsigned int' [-Werror,-Wsign-compare]
            if (st.st_size < 2 * sizeof(char) * MD5_DIGEST_LENGTH) {
                ~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    samsung-ipc/rfs.c:176:17: error: comparison of integers
    of different signs:
    '__off_t' (aka 'long') and 'unsigned int' [-Werror,-Wsign-compare]
            if (st.st_size < 2 * sizeof(char) * MD5_DIGEST_LENGTH) {
                ~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo at cyberdimension.org>
---
 samsung-ipc/rfs.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/samsung-ipc/rfs.c b/samsung-ipc/rfs.c
index 114df99..3871b35 100644
--- a/samsung-ipc/rfs.c
+++ b/samsung-ipc/rfs.c
@@ -112,7 +112,8 @@ int ipc_nv_data_md5_path_check(struct ipc_client *client)
 		return -1;
 	}
 
-	if (st.st_size < 2 * sizeof(char) * MD5_DIGEST_LENGTH) {
+	if ((unsigned long)st.st_size <
+	    (2 * (unsigned long)sizeof(char) * MD5_DIGEST_LENGTH)) {
 		ipc_client_log(client, "Checking nv_data md5 size failed");
 		return -1;
 	}
@@ -173,7 +174,8 @@ int ipc_nv_data_backup_md5_path_check(struct ipc_client *client)
 		return -1;
 	}
 
-	if (st.st_size < 2 * sizeof(char) * MD5_DIGEST_LENGTH) {
+	if ((unsigned long)st.st_size <
+	    (2 * (unsigned long)sizeof(char) * MD5_DIGEST_LENGTH)) {
 		ipc_client_log(client,
 			       "Checking nv_data backup md5 size failed");
 		return -1;
-- 
2.29.2