Merge pull request bulletphysics#2459 from erwincoumans/master

bump up to Bullet version 2.89 and update serialization structures

VERSION

@@ -1 +1 @@
-2.88
+2.89

src/BulletDynamics/ConstraintSolver/btContactSolverInfo.h

@@ -155,15 +155,15 @@ struct btContactSolverInfoFloatData
 	float m_warmstartingFactor;
 	float m_articulatedWarmstartingFactor;
 	float m_maxGyroscopicForce;
-	float m_singleAxisRollingFrictionThreshold;
 
+	float m_singleAxisRollingFrictionThreshold;
 	int m_numIterations;
 	int m_solverMode;
 	int m_restingContactRestitutionThreshold;
-	int m_minimumSolverBatchSize;
 
+	int m_minimumSolverBatchSize;
 	int m_splitImpulse;
-	char m_padding[4];
+
 };
 
 #endif  //BT_CONTACT_SOLVER_INFO

src/BulletDynamics/Dynamics/btDiscreteDynamicsWorld.cpp

@@ -1436,9 +1436,7 @@ void btDiscreteDynamicsWorld::serializeDynamicsWorldInfo(btSerializer* serialize
 
 	worldInfo->m_solverInfo.m_splitImpulse = getSolverInfo().m_splitImpulse;
 
-	// Fill padding with zeros to appease msan.
-	memset(worldInfo->m_solverInfo.m_padding, 0, sizeof(worldInfo->m_solverInfo.m_padding));
-
+
 #ifdef BT_USE_DOUBLE_PRECISION
 	const char* structType = "btDynamicsWorldDoubleData";
 #else   //BT_USE_DOUBLE_PRECISION

src/LinearMath/btScalar.h

@@ -25,13 +25,23 @@ subject to the following restrictions:
 #include <float.h>
 
 /* SVN $Revision$ on $Date$ from http://bullet.googlecode.com*/
-#define BT_BULLET_VERSION 288
+#define BT_BULLET_VERSION 289
 
 inline int btGetVersion()
 {
 	return BT_BULLET_VERSION;
 }
 
+inline int btIsDoublePrecision()
+{
+  #ifdef BT_USE_DOUBLE_PRECISION
+  return true;
+  #else
+  return false;
+  #endif
+}
+
+
 // The following macro "BT_NOT_EMPTY_FILE" can be put into a file
 // in order suppress the MS Visual C++ Linker warning 4221
 //

src/LinearMath/btSerializer.h

@@ -481,7 +481,7 @@ class btDefaultSerializer : public btSerializer
 
 		buffer[9] = '2';
 		buffer[10] = '8';
-		buffer[11] = '8';
+		buffer[11] = '9';
 	}
 
 	virtual void startSerialization()