fix a typo

Author: amontoison

src/libblas.jl

@@ -8,7 +8,7 @@ end
 
 function dsymv(uplo, n, alpha, A, lda, px, stx, beta, py, sty)
     return ccall((@blasfunc(dsymv_), libblastrampoline), Cvoid,
-                 (Ref{UInt8}, Ref{BlasInt}, RefFloat64}, Ptr{Float64},
+                 (Ref{UInt8}, Ref{BlasInt}, Ref{Float64}, Ptr{Float64},
                   Ref{BlasInt}, Ptr{Float64}, Ref{BlasInt}, Ref{Float64},
                   Ptr{Float64}, Ref{BlasInt}),
                  uplo, n, alpha, A, lda, px, stx, beta, py, sty)