bsd_user: Fix potential null pointer dereference

This bug was spotted by cppcheck.

Using g_try_malloc0 (as does the linux-user code) fixes this.

v2:
Use g_free in bsdload.c, too. Thanks to Peter Maydell for this hint.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

bsd-user/bsdload.c

@@ -196,7 +196,7 @@ int loader_exec(const char * filename, char ** argv, char ** envp,
 
     /* Something went wrong, return the inode and free the argument pages*/
     for (i=0 ; i<MAX_ARG_PAGES ; i++) {
-        free(bprm.page[i]);
+        g_free(bprm.page[i]);
     }
     return(retval);
 }