Slight changes needed for 22MW turbine

[mrnorman]

In order to get the 22MW turbine working with this on my machine, I had to make the changes below. I'm far from an expert in python, so it might be some other problem with my setup, but feel free to ignore if that's the case. Thanks for making this utility, by the way. It's been really useful. I've placed my environment into a public gist here: https://gist.github.com/mrnorman/adf6f6237b35ac5781fa918b6e121181

-Matt

(base) [imn@lapitat:~/windio2cad] 8-) git diff
diff --git a/windio2cad/__main__.py b/windio2cad/__main__.py
index 4838d2e..f6354e1 100644
--- a/windio2cad/__main__.py
+++ b/windio2cad/__main__.py
@@ -119,7 +119,7 @@ class Blade:
             points = np.c_[
                 self.airfoils[i]["coordinates"]["x"],
                 self.airfoils[i]["coordinates"]["y"],
-            ]
+            ].astype(np.float64)
 
             # Check that airfoil points are declared from the TE suction side to TE pressure side
             idx_le = np.argmin(points[:, 0])
diff --git a/windio2cad/distfunc.py b/windio2cad/distfunc.py
index 669a8d2..0e57734 100644
--- a/windio2cad/distfunc.py
+++ b/windio2cad/distfunc.py
@@ -37,14 +37,14 @@ def distfunc(dinp, ival=1):
     fdist[0] = 0.0
     s0 = dinp[0, 0]
     d0 = dinp[0, 1]
-    n0 = np.int(dinp[0, 2]) - 1
+    n0 = np.int64(dinp[0, 2]) - 1
 
     for i in range(1, nn):
         s1 = dinp[i, 0]
         if i  > 0  and d0 < 0.:
             d0 = fdist[n0] - fdist[n0-1]
         d1 = dinp[i, 1]
-        n1 = np.int(dinp[i, 2]) - 1
+        n1 = np.int64(dinp[i, 2]) - 1
         _len = s1 - s0
         delta1 = d0
         delta2 = d1