PIDeque fix ssize_t

fix uninitialized variables
fix PIDeque prepend with std::initializer_list

libs/main/containers/picontainers.h

@@ -65,13 +65,13 @@ private:
 
 class PIP_EXPORT _PIContainerConstantsBase {
 public:
-	static ssize_t calcMinCountPoT(ssize_t szof);
+	static size_t calcMinCountPoT(size_t szof);
 };
 
 template<typename T>
 class _PIContainerConstants {
 public:
-	static ssize_t minCountPoT() {static ssize_t ret = _PIContainerConstantsBase::calcMinCountPoT(sizeof(T)); return ret;}
+	static size_t minCountPoT() {static size_t ret = _PIContainerConstantsBase::calcMinCountPoT(sizeof(T)); return ret;}
 };