build: only use the release binaries for BulletPhysics for now.

build/vs2010/Lol.Core.Vars.props

@@ -22,7 +22,7 @@
     <!-- BulletPhysics -->
     <BtPhysDir>$(ContribDir)\bullet-2.80-rev2531</BtPhysDir>
     <BtPhysIncludes>$(BtPhysDir)\include</BtPhysIncludes>
-    <BtPhysLibs Condition="'$(Platform)'=='Win32'">$(BtPhysDir)\lib</BtPhysLibs>
+    <BtPhysLibs Condition="'$(Platform)'=='Win32'">$(BtPhysDir)\lib\i686-w64-mingw32</BtPhysLibs>
     <BtPhysDeps Condition="'$(Platform)'=='Win32'">BulletCollision.lib;BulletDynamics.lib;BulletSoftBody.lib;LinearMath.lib</BtPhysDeps>
     <Win32Defines>$(Win32Defines)</Win32Defines>