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Manager: don't crash if GUI RPC returns empty reply
... though it's not clear how this could happen.
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@ -333,6 +333,7 @@ int RPC_CLIENT::get_reply(char*& mbuf) {
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MFILE mf;
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MFILE mf;
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int n;
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int n;
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mf.puts(""); // make sure buffer is non-NULL
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while (1) {
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while (1) {
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n = recv(sock, buf, 8192, 0);
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n = recv(sock, buf, 8192, 0);
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if (n <= 0) return ERR_READ;
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if (n <= 0) return ERR_READ;
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