Make Debug configuration compile once more.

indra/llmath/llplane.h

@@ -104,7 +104,8 @@ private:
 	LL_ALIGN_16(LLVector4a mV);
 } LL_ALIGN_POSTFIX(16);
 
+#if !defined(LL_DEBUG)
 static_assert(std::is_trivial<LLPlane>::value, "LLPlane must be a trivial type");
 static_assert(std::is_standard_layout<LLPlane>::value, "LLPlane must be a standard layout type");
-
+#endif
 #endif // LL_LLPLANE_H