re-type the pct variables

contracts/eosio.system/eosio.system.abi

@@ -98,9 +98,9 @@
          {"name":"max_transaction_cpu_usage", "type":"uint32"},
          {"name":"max_transaction_net_usage", "type":"uint32"},
          {"name":"max_block_cpu_usage", "type": "uint64"},
-         {"name":"target_block_cpu_usage_pct", "type": "int32"},
+         {"name":"target_block_cpu_usage_pct", "type": "uint32"},
          {"name":"max_block_net_usage", "type": "uint64"},
-         {"name":"target_block_net_usage_pct", "type": "int32"},
+         {"name":"target_block_net_usage_pct", "type": "uint32"},
          {"name":"max_transaction_lifetime", "type":"uint32"},
          {"name":"max_transaction_exec_time", "type":"uint32"},
          {"name":"max_authority_depth", "type":"uint16"},

contracts/eosio.system/voting.hpp

@@ -253,9 +253,9 @@ namespace eosiosystem {
             std::array<uint32_t, 21> max_transaction_cpu_usage;
             std::array<uint32_t, 21> max_transaction_net_usage;
             std::array<uint64_t, 21> max_block_cpu_usage;
-            std::array<int     , 21> target_block_cpu_usage_pct;
+            std::array<uint32_t, 21> target_block_cpu_usage_pct;
             std::array<uint64_t, 21> max_block_net_usage;
-            std::array<int     , 21> target_block_net_usage_pct;
+            std::array<uint32_t, 21> target_block_net_usage_pct;
             std::array<uint32_t, 21> max_transaction_lifetime;
             std::array<uint16_t, 21> max_authority_depth;
             std::array<uint32_t, 21> max_transaction_exec_time;

contracts/eosiolib/privileged.hpp

@@ -17,9 +17,9 @@ namespace eosio {
       uint32_t max_transaction_cpu_usage;
       uint32_t max_transaction_net_usage;
       uint64_t max_block_cpu_usage;
-      int      target_block_cpu_usage_pct;
+      uint32_t target_block_cpu_usage_pct;
       uint64_t max_block_net_usage;
-      int      target_block_net_usage_pct;
+      uint32_t target_block_net_usage_pct;
       uint32_t max_transaction_lifetime;
       uint32_t max_transaction_exec_time;
       uint16_t max_authority_depth;

libraries/chain/include/eosio/chain/chain_config.hpp

@@ -32,9 +32,9 @@ struct chain_config {
    uint32_t   max_transaction_net_usage;      ///< the maximum objectively measured net usage that the chain will allow regardless of account limits
 
    uint64_t   max_block_cpu_usage;            ///< the maxiumum cpu usage in instructions for a block
-   int        target_block_cpu_usage_pct;     ///< the target percent (1% == 100, 100%= 10,000) of maximum cpu usage; exceeding this triggers congestion handling
+   uint32_t   target_block_cpu_usage_pct;     ///< the target percent (1% == 100, 100%= 10,000) of maximum cpu usage; exceeding this triggers congestion handling
    uint64_t   max_block_net_usage;            ///< the maxiumum net usage in instructions for a block
-   int        target_block_net_usage_pct;     ///< the target percent (1% == 100, 100%= 10,000) of maximum net usage; exceeding this triggers congestion handling
+   uint32_t   target_block_net_usage_pct;     ///< the target percent (1% == 100, 100%= 10,000) of maximum net usage; exceeding this triggers congestion handling
 
    uint32_t   max_transaction_lifetime;
    uint32_t   max_transaction_exec_time;