Add minimum for swap (1GB).

install/variables/autopartition.py

@@ -112,7 +112,10 @@ class VariableHrMemorySize(ReadonlyVariable):
                        map(reMemTotal.search,
                        readLinesFile('/proc/meminfo')))
         if totalMemList:
-            return str(int(totalMemList[0].group(1))*1024)
+            size = int(totalMemList[0].group(1))*1024
+            if size < 1024*1024*1024:
+                size = 1024*1024*1024
+            return str(size)
         return "0"
 
     def humanReadable(self):