PIDeque fix ssize_t

fix uninitialized variables
fix PIDeque prepend with std::initializer_list

utils/piterminal/main.cpp

@@ -211,9 +211,9 @@ public:
 			WriteConsoleInput(cstdin, ir.data(), ir.size_s(), &wrote);
 			} break;
 		case mtResize: {
-			int rw, rh;
+			int rw = -1, rh = -1;
 			msg >> rw >> rh;
-			resizeConsole(rw, rh);
+			if (rw > 0 && rh > 0) resizeConsole(rw, rh);
 			} break;
 		default: break;
 		}