firmware-utils/mksercommfw: fix build with clang/macOS

fixes error: non-void function 'main' should return a value

Fixes: FS#1770
Signed-off-by: Ryan Mounce <ryan@mounce.com.au>
(backported from 9c6c7d11c795cd632c4d736577d7bb65ed35d729)

diff --git a/tools/firmware-utils/src/mksercommfw.c b/tools/firmware-utils/src/mksercommfw.c
index b415776a956d7e3a5fa886df7d8476911a98f9dc..7f31d4f4c79c3b6bdc6d74af66e1fc2581727f59 100644 (file)
--- a/tools/firmware-utils/src/mksercommfw.c
+++ b/tools/firmware-utils/src/mksercommfw.c
@@ -135,7 +135,7 @@ int main(int argc, char *argv[])
                bufferFile(&myfile, 0);
                char chksum = getCheckSum(myfile.file_data, myfile.file_size);
                printf("Checksum for File: %X.\n", chksum);
-               return;
+               return 0;
        }
 
        if (argc != 6) {