Support absence of wallet (pwalletMain==NULL) in several locations,

notably RPC.

src/rpcmining.cpp

@@ -18,12 +18,18 @@ static CReserveKey* pMiningKey = NULL;
 
 void InitRPCMining()
 {
+    if (!pwalletMain)
+        return;
+
     // getwork/getblocktemplate mining rewards paid here:
     pMiningKey = new CReserveKey(pwalletMain);
 }
 
 void ShutdownRPCMining()
 {
+    if (!pMiningKey)
+        return;
+
     delete pMiningKey; pMiningKey = NULL;
 }
 
@@ -87,6 +93,9 @@ Value getgenerate(const Array& params, bool fHelp)
             "getgenerate\n"
             "Returns true or false.");
 
+    if (!pMiningKey)
+        return false;
+
     return GetBoolArg("-gen", false);
 }
 
@@ -112,6 +121,7 @@ Value setgenerate(const Array& params, bool fHelp)
     }
     mapArgs["-gen"] = (fGenerate ? "1" : "0");
 
+    assert(pwalletMain != NULL);
     GenerateBitcoins(fGenerate, pwalletMain);
     return Value::null;
 }
@@ -143,7 +153,7 @@ Value getmininginfo(const Array& params, bool fHelp)
     obj.push_back(Pair("currentblocktx",   (uint64_t)nLastBlockTx));
     obj.push_back(Pair("difficulty",       (double)GetDifficulty()));
     obj.push_back(Pair("errors",           GetWarnings("statusbar")));
-    obj.push_back(Pair("generate",         GetBoolArg("-gen", false)));
+    obj.push_back(Pair("generate",         getgenerate(params, false)));
     obj.push_back(Pair("genproclimit",     (int)GetArg("-genproclimit", -1)));
     obj.push_back(Pair("hashespersec",     gethashespersec(params, false)));
     obj.push_back(Pair("networkhashps",    getnetworkhashps(params, false)));
@@ -261,6 +271,7 @@ Value getwork(const Array& params, bool fHelp)
         pblock->vtx[0].vin[0].scriptSig = mapNewBlock[pdata->hashMerkleRoot].second;
         pblock->hashMerkleRoot = pblock->BuildMerkleTree();
 
+        assert(pwalletMain != NULL);
         return CheckWork(pblock, *pwalletMain, *pMiningKey);
     }
 }