add has_init

Author: SebastianM-C

src/integrator_interface.jl

@@ -83,7 +83,7 @@ end
 """
     ratenoise_cache(integrator::DEIntegrator)
 
-Returns cache arrays for rate noise in stochastic differential equations. 
+Returns cache arrays for rate noise in stochastic differential equations.
 Returns an empty tuple by default for deterministic problems.
 """
 ratenoise_cache(i::DEIntegrator) = ()
@@ -569,6 +569,8 @@ end
 
 ### Integrator traits
 
+has_init(i::Any) = false
+
 has_reinit(i::DEIntegrator) = false
 
 ### Display