Do not shadow LOCK's criticalblock variable for LOCK inside LOCK

Author: paveljanik

src/sync.h

@@ -171,7 +171,10 @@ class SCOPED_LOCKABLE CMutexLock
 
 typedef CMutexLock<CCriticalSection> CCriticalBlock;
 
-#define LOCK(cs) CCriticalBlock criticalblock(cs, #cs, __FILE__, __LINE__)
+#define PASTE(x, y) x ## y
+#define PASTE2(x, y) PASTE(x, y)
+
+#define LOCK(cs) CCriticalBlock PASTE2(criticalblock, __COUNTER__)(cs, #cs, __FILE__, __LINE__)
 #define LOCK2(cs1, cs2) CCriticalBlock criticalblock1(cs1, #cs1, __FILE__, __LINE__), criticalblock2(cs2, #cs2, __FILE__, __LINE__)
 #define TRY_LOCK(cs, name) CCriticalBlock name(cs, #cs, __FILE__, __LINE__, true)