fix MinGW compilation, use size_t instead of unsigned long

add missing virtual methods in SequentialThreadSupport

src/BulletMultiThreaded/SequentialThreadSupport.cpp

@@ -165,5 +165,17 @@ btCriticalSection* SequentialThreadSupport::createCriticalSection()
 	
 }
 
+void SequentialThreadSupport::deleteBarrier(btBarrier* barrier)
+{
+    delete barrier;
+}
+
+void SequentialThreadSupport::deleteCriticalSection(btCriticalSection* criticalSection)
+{
+    delete criticalSection;
+}
+
+
+
 
 

src/BulletMultiThreaded/SequentialThreadSupport.h

@@ -89,6 +89,10 @@ public:
 
 	virtual btCriticalSection* createCriticalSection();
 	
+    virtual void deleteBarrier(btBarrier* barrier);
+    
+    virtual void deleteCriticalSection(btCriticalSection* criticalSection);
+
 
 };
 

src/BulletMultiThreaded/btThreadSupportInterface.h

@@ -79,7 +79,7 @@ public:
 
 	virtual void deleteBarrier(btBarrier* barrier)=0;
 
-        virtual void deleteCriticalSection(btCriticalSection* criticalSection)=0;
+    virtual void deleteCriticalSection(btCriticalSection* criticalSection)=0;
 	
 	virtual void*	getThreadLocalMemory(int taskId) { return 0; }