Fixed issues found by static analysis

- rolling_median: tried to free uninitialized pointer in a constructor
- net_node.inl: erase-remove idiom was used incorrectly. remove_if doesn't actually remove elements, see http://cpp.sh/6fcjv
- bulletproofs.cc: call to sizeof() instead of vector.size(), luckily it only impacts performance and not code logic there

contrib/epee/include/rolling_median.h

@@ -141,7 +141,6 @@ public:
 
   rolling_median_t(rolling_median_t &&m)
   {
-    free(data);
     memcpy(this, &m, sizeof(rolling_median_t));
     m.data = NULL;
   }

src/p2p/net_node.inl

@@ -2830,8 +2830,8 @@ namespace nodetool
     const uint32_t index = stripe - 1;
     CRITICAL_REGION_LOCAL(m_used_stripe_peers_mutex);
     MINFO("adding stripe " << stripe << " peer: " << context.m_remote_address.str());
-    std::remove_if(m_used_stripe_peers[index].begin(), m_used_stripe_peers[index].end(),
-        [&context](const epee::net_utils::network_address &na){ return context.m_remote_address == na; });
+    m_used_stripe_peers[index].erase(std::remove_if(m_used_stripe_peers[index].begin(), m_used_stripe_peers[index].end(),
+        [&context](const epee::net_utils::network_address &na){ return context.m_remote_address == na; }), m_used_stripe_peers[index].end());
     m_used_stripe_peers[index].push_back(context.m_remote_address);
   }
 
@@ -2844,8 +2844,8 @@ namespace nodetool
     const uint32_t index = stripe - 1;
     CRITICAL_REGION_LOCAL(m_used_stripe_peers_mutex);
     MINFO("removing stripe " << stripe << " peer: " << context.m_remote_address.str());
-    std::remove_if(m_used_stripe_peers[index].begin(), m_used_stripe_peers[index].end(),
-        [&context](const epee::net_utils::network_address &na){ return context.m_remote_address == na; });
+    m_used_stripe_peers[index].erase(std::remove_if(m_used_stripe_peers[index].begin(), m_used_stripe_peers[index].end(),
+        [&context](const epee::net_utils::network_address &na){ return context.m_remote_address == na; }), m_used_stripe_peers[index].end());
   }
 
   template<class t_payload_net_handler>

src/ringct/bulletproofs.cc

@@ -826,7 +826,7 @@ bool bulletproof_VERIFY(const std::vector<const Bulletproof*> &proofs)
   proof_data.reserve(proofs.size());
   size_t inv_offset = 0;
   std::vector<rct::key> to_invert;
-  to_invert.reserve(11 * sizeof(proofs));
+  to_invert.reserve(11 * proofs.size());
   size_t max_logM = 0;
   for (const Bulletproof *p: proofs)
   {