Move side effect out of assert

Author: kg

src/coreclr/interpreter/stackmap.cpp

@@ -33,7 +33,8 @@ InterpreterStackMap* GetInterpreterStackMap(ICorJitInfo* jitInfo, CORINFO_CLASS_
     if (!dn_simdhash_ptr_ptr_try_get_value(t_sharedStackMapLookup, classHandle, (void **)&result))
     {
         result = new InterpreterStackMap(jitInfo, classHandle);
-        assert(dn_simdhash_ptr_ptr_try_add(t_sharedStackMapLookup, classHandle, result) == DN_SIMDHASH_ADD_INSERTED);
+        dn_simdhash_add_result addResult = dn_simdhash_ptr_ptr_try_add(t_sharedStackMapLookup, classHandle, result);
+        assert(addResult == DN_SIMDHASH_ADD_INSERTED);
     }
     return result;
 }