Bug 1389401 - MIPS: Add missing function. r=luke

Wasm, stop patching generated code.

TODO: WASM function check/fix.

js/src/jit/mips-shared/LIR-mips-shared.h

@@ -308,7 +308,7 @@ class LWasmUnalignedLoadBase : public details::LWasmLoadBase<NumDefs, 2>
     typedef LWasmLoadBase<NumDefs, 2> Base;
 
     explicit LWasmUnalignedLoadBase(const LAllocation& ptr, const LDefinition& valueHelper)
-      : Base(ptr)
+      : Base(ptr,  LAllocation())
     {
         Base::setTemp(0, LDefinition::BogusTemp());
         Base::setTemp(1, valueHelper);