Switch from malloc to calloc in addFlags

pkgs/build-support/setup-hooks/make-binary-wrapper.sh

@@ -155,7 +155,7 @@ addFlags() {
         flag=$(escapeStringLiteral "${flags[$n]}")
         result="$result    ${var}[$((n+1))] = \"$flag\";"$'\n'
     done
-    printf '    %s\n' "char **$var = malloc(sizeof(*$var) * ($((n+1)) + argc));"
+    printf '    %s\n' "char **$var = calloc($((n+1)) + argc, sizeof(*$var));"
     printf '    %s\n' "assert($var != NULL);"
     printf '    %s\n' "${var}[0] = argv[0];"
     printf '%s' "$result"

pkgs/test/make-binary-wrapper/add-flags.c

@@ -7,7 +7,7 @@
 #include <assert.h>
 
 int main(int argc, char **argv) {
-    char **argv_tmp = malloc(sizeof(*argv_tmp) * (5 + argc));
+    char **argv_tmp = calloc(5 + argc, sizeof(*argv_tmp));
     assert(argv_tmp != NULL);
     argv_tmp[0] = argv[0];
     argv_tmp[1] = "-x";

pkgs/test/make-binary-wrapper/combination.c

@@ -47,7 +47,7 @@ int main(int argc, char **argv) {
     set_env_suffix("PATH", ":", "/usr/local/bin/");
     putenv("MESSAGE2=WORLD");
 
-    char **argv_tmp = malloc(sizeof(*argv_tmp) * (4 + argc));
+    char **argv_tmp = calloc(4 + argc, sizeof(*argv_tmp));
     assert(argv_tmp != NULL);
     argv_tmp[0] = argv[0];
     argv_tmp[1] = "-x";