BT_USE_DOUBLE_PRECISION was missing from bullet.pc using cmake

Thanks to Sigluy, see Issue 471

Default constructor for btBvhTriangleMeshShape causes NULL dereference, so removed obsolete constructor.
Thanks to exarkun, see Issue 465

CMakeLists.txt

@@ -190,6 +190,7 @@ ENDIF (INTERNAL_UPDATE_SERIALIZATION_STRUCTURES)
 
 IF (USE_DOUBLE_PRECISION)
 ADD_DEFINITIONS( -DBT_USE_DOUBLE_PRECISION)
+SET( BULLET_DOUBLE_DEF "-DBT_USE_DOUBLE_PRECISION")
 ENDIF (USE_DOUBLE_PRECISION)
 
 IF(USE_GRAPHICAL_BENCHMARK)

bullet.pc.cmake

@@ -3,4 +3,4 @@ Description: Bullet Continuous Collision Detection and Physics Library
 Requires:
 Version: @BULLET_VERSION@
 Libs: -L@LIB_DESTINATION@ -lBulletSoftBody -lBulletDynamics -lBulletCollision -lLinearMath
-Cflags: -I@INCLUDE_INSTALL_DIR@
+Cflags: @BULLET_DOUBLE_DEF@ -I@INCLUDE_INSTALL_DIR@

src/BulletCollision/CollisionShapes/btBvhTriangleMeshShape.h

@@ -39,7 +39,7 @@ public:
 
 	BT_DECLARE_ALIGNED_ALLOCATOR();
 
-	btBvhTriangleMeshShape() : btTriangleMeshShape(0),m_bvh(0),m_triangleInfoMap(0),m_ownsBvh(false) {m_shapeType = TRIANGLE_MESH_SHAPE_PROXYTYPE;};
+	
 	btBvhTriangleMeshShape(btStridingMeshInterface* meshInterface, bool useQuantizedAabbCompression, bool buildBvh = true);
 
 	///optionally pass in a larger bvh aabb, used for quantization. This allows for deformations within this aabb

src/BulletCollision/CollisionShapes/btMultimaterialTriangleMeshShape.h

@@ -31,7 +31,6 @@ public:
 
 	BT_DECLARE_ALIGNED_ALLOCATOR();
 
-    btMultimaterialTriangleMeshShape(): btBvhTriangleMeshShape() {m_shapeType = MULTIMATERIAL_TRIANGLE_MESH_PROXYTYPE;}
     btMultimaterialTriangleMeshShape(btStridingMeshInterface* meshInterface, bool useQuantizedAabbCompression, bool buildBvh = true):
         btBvhTriangleMeshShape(meshInterface, useQuantizedAabbCompression, buildBvh)
         {