Fix some issues found by cppcheck

include/chaiscript/chaiscript_threading.hpp

@@ -45,14 +45,14 @@ namespace chaiscript
       class unique_lock : public std::unique_lock<T>
       {
         public:
-          unique_lock(T &t) : std::unique_lock<T>(t) {}
+          explicit unique_lock(T &t) : std::unique_lock<T>(t) {}
       };
 
       template<typename T>
       class shared_lock : public std::unique_lock<T>
       {
         public:
-          shared_lock(T &t) : std::unique_lock<T>(t) {}
+          explicit shared_lock(T &t) : std::unique_lock<T>(t) {}
           void unlock() {}
       };
 
@@ -60,7 +60,7 @@ namespace chaiscript
       class lock_guard : public std::lock_guard<T>
       {
         public:
-          lock_guard(T &t) : std::lock_guard<T>(t) {}
+          explicit lock_guard(T &t) : std::lock_guard<T>(t) {}
       };
 
       class shared_mutex : public std::mutex { };
@@ -77,7 +77,7 @@ namespace chaiscript
         {
           public:
 
-            Thread_Storage(void *t_key)
+            explicit Thread_Storage(void *t_key)
               : m_key(t_key)
             {
             }
@@ -129,7 +129,7 @@ namespace chaiscript
         {
           public:
 
-            Thread_Storage(void *)
+            explicit Thread_Storage(void *)
             {
             }
 
@@ -183,7 +183,7 @@ namespace chaiscript
       class unique_lock 
       {
         public:
-          unique_lock(T &) {}
+          explicit unique_lock(T &) {}
           void lock() {}
           void unlock() {}
       };
@@ -192,7 +192,7 @@ namespace chaiscript
       class shared_lock 
       {
         public:
-          shared_lock(T &) {}
+          explicit shared_lock(T &) {}
           void lock() {}
           void unlock() {}
       };
@@ -201,7 +201,7 @@ namespace chaiscript
       class lock_guard 
       {
         public:
-          lock_guard(T &) {}
+          explicit lock_guard(T &) {}
       };
 
       class shared_mutex { };
@@ -213,7 +213,7 @@ namespace chaiscript
         class Thread_Storage
         {
           public:
-            Thread_Storage(void *)
+            explicit Thread_Storage(void *)
             {
             }