Fix LLVMDoubleVisitor::init declaration

Author: isuruf

symengine/lib/symengine.pxd

@@ -970,7 +970,7 @@ cdef extern from "<symengine/lambda_double.h>" namespace "SymEngine":
 cdef extern from "<symengine/llvm_double.h>" namespace "SymEngine":
     cdef cppclass LLVMDoubleVisitor:
         LLVMDoubleVisitor() nogil
-        void init(const vec_basic &x, const vec_basic &b) nogil except +
+        void init(const vec_basic &x, const vec_basic &b, bool cse) nogil except +
         void call(double *r, const double *x) nogil
 
 cdef extern from "<symengine/series.h>" namespace "SymEngine":