Some more fixes to reduce memory

Author: ranjanan

src/classical.jl

@@ -127,7 +127,7 @@ function rs_direct_interpolation_pass1(T, A, splitting)
 
             if sum_strong_pos == 0
                 diag += sum_all_pos
-                beta = 0
+                beta = zero(beta)
             end
 
             neg_coeff = -1 * alpha / diag
@@ -152,7 +152,7 @@ function rs_direct_interpolation_pass1(T, A, splitting)
     end
 
     m = zeros(Ti, n)
-    sum = 0
+    sum = zero(eltype(m))
     for i = 1:n
         m[i] = sum
         sum += splitting[i]

src/strength.jl

@@ -50,7 +50,7 @@ function strength_of_connection{T, Ti, Tv}(c::Classical{T}, A::SparseMatrixCSC{T
 end
 
 function find_max_off_diag(A, i)
-    m = 0
+    m = zero(eltype(A))
     for j in nzrange(A, i)
         row = A.rowval[j]
         val = A.nzval[j]