windows.gaming.input: Add gain of 1.0 to the initialization params of (Constant|Ramp)Effect's SetParameters.

Fixes FH5 not having (or having very subtle) force feedback.
Potentially affects most WGI games, since the constant effect is
usually the main effect.

dlls/windows.gaming.input/constant_effect.c

@@ -107,6 +107,7 @@ static HRESULT WINAPI effect_SetParameters( IConstantForceEffect *iface, Vector3
             .direction = direction,
             .duration = duration,
             .repeat_count = 1,
+            .gain = 1.,
         },
     };
     struct constant_effect *impl = impl_from_IConstantForceEffect( iface );

dlls/windows.gaming.input/ramp_effect.c

@@ -108,6 +108,7 @@ static HRESULT WINAPI effect_SetParameters( IRampForceEffect *iface, Vector3 sta
             .end_vector = end_vector,
             .duration = duration,
             .repeat_count = 1,
+            .gain = 1.,
         },
     };
     struct ramp_effect *impl = impl_from_IRampForceEffect( iface );