Fixing issue with 'Eliminate sliver polygons' and fields of type long.

(cherry picked from commit be25a29)

Author: gacarrillor

python/plugins/processing/algs/qgis/Eliminate.py

@@ -102,7 +102,7 @@ def processAlgorithm(self, progress):
             selectType = inLayer.fields()[selectindex].type()
             selectionError = False
 
-            if selectType == 2:
+            if selectType == 2 or selectType == 4:
                 try:
                     y = int(comparisonvalue)
                 except ValueError:
@@ -162,7 +162,7 @@ def processAlgorithm(self, progress):
                     if aValue is None:
                         continue
 
-                    if selectType == 2:
+                    if selectType == 2 or selectType == 4:
                         x = int(aValue)
                     elif selectType == 6:
                         x = float(aValue)