A new libpanda .dll error noted when upgrading to panda 1.8

C++ coding using Panda3D
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Also keep in mind that 1.8.1 and 1.7.2 are not ABI-compatible; that is, if something is compiled against Panda3D 1.7, it must be recompiled in order for you to be able to use it against Panda3D 1.8.