removed conflict in system.nim

lib/system.nim

@@ -1797,6 +1797,24 @@ when not defined(EcmaScript) and not defined(NimrodVM):
 
   # -------------------------------------------------------------------------
 
+  proc allocCStringArray*(a: openArray[string]): cstringArray =
+    ## creates a NULL terminated cstringArray from `a`. The result has to
+    ## be freed with `deallocCStringArray` after it's not needed anymore.
+    result = cast[cstringArray](alloc0((a.len+1) * sizeof(cstring)))
+    for i in 0 .. a.high:
+      # XXX get rid of this string copy here:
+      var x = a[i]
+      result[i] = cast[cstring](alloc0(x.len+1))
+      copyMem(result[i], addr(x[0]), x.len)
+
+  proc deallocCStringArray*(a: cstringArray) =
+    ## frees a NULL terminated cstringArray.
+    var i = 0
+    while a[i] != nil:
+      dealloc(a[i])
+      inc(i)
+    dealloc(a)
+
   proc atomicInc*(memLoc: var int, x: int = 1): int {.inline, discardable.}
     ## atomic increment of `memLoc`. Returns the value after the operation.