Update code style, fix compiler warnings

- Use nullptr instead of NULL for better warnings in case of mistakes
- Get rid of VLAs which are not in C++11 actually
- Fix implicit signed <-> unsigned mismatches by adding checks and casts

1 files changed, 1 insertions, 1 deletions

diff --git a/src/server/connectionframe/connectionframe.h b/src/server/connectionframe/connectionframe.h
index 898d97a..ba5f235 100644
--- a/src/server/connectionframe/connectionframe.h
+++ b/src/server/connectionframe/connectionframe.h
@@ -66,7 +66,7 @@ public:
 	inline bool isSelected() { return _isSelected; }
 
 	const QString& computerId() const { return _computerId; }
-	void setComputerId(QString computerId) { if (_client != NULL) return; _computerId = computerId; updateLabels(); }
+	void setComputerId(QString computerId) { if (_client != nullptr) return; _computerId = computerId; updateLabels(); }
 	Client* client() const { return _client; }
 
 	inline bool isTutor() { return _isTutor; }