util: Make qemu_oom_check() a static function

The qemu_oom_check() function, which we define in both oslib-posix.c
and oslib-win32.c, is now used only locally in that file; make it
static.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20220226180723.1706285-3-peter.maydell@linaro.org

include/qemu-common.h

@@ -26,8 +26,6 @@
 int qemu_main(int argc, char **argv, char **envp);
 #endif
 
-void *qemu_oom_check(void *ptr);
-
 ssize_t qemu_write_full(int fd, const void *buf, size_t count)
     QEMU_WARN_UNUSED_RESULT;
 

util/oslib-posix.c

@@ -199,7 +199,7 @@ bool qemu_write_pidfile(const char *path, Error **errp)
     return false;
 }
 
-void *qemu_oom_check(void *ptr)
+static void *qemu_oom_check(void *ptr)
 {
     if (ptr == NULL) {
         fprintf(stderr, "Failed to allocate memory: %s\n", strerror(errno));

util/oslib-win32.c

@@ -44,7 +44,7 @@
 /* this must come after including "trace.h" */
 #include <shlobj.h>
 
-void *qemu_oom_check(void *ptr)
+static void *qemu_oom_check(void *ptr)
 {
     if (ptr == NULL) {
         fprintf(stderr, "Failed to allocate memory: %lu\n", GetLastError());