Fix environ termination, by Andreas Schwab.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3027 c046a42c-6fe2-441c-8c8c-71466251a162

linux-user/main.c

@@ -1819,7 +1819,7 @@ int main(int argc, char **argv)
             continue;
         *(dst++) = strdup(*wrk);
     }
-    dst = NULL; /* NULL terminate target_environ */
+    *dst = NULL; /* NULL terminate target_environ */
 
     if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) {
         printf("Error loading %s\n", filename);