--- sys/pow_int.c~	2010-03-10 10:57:14.000000000 +0000
+++ sys/pow_int.c	2010-09-27 11:45:06.000000000 +0100
@@ -28,20 +28,23 @@
 double gsl_pow_int(double x, int n)
 {
   double value = 1.0;
+  unsigned int un;
 
   if(n < 0) {
     x = 1.0/x;
-    n = -n;
+    un = -n;
+  } else {
+    un = n;
   }
 
   /* repeated squaring method 
    * returns 0.0^0 = 1.0, so continuous in x
    */
   do {
-     if(n & 1) value *= x;  /* for n odd */
-     n >>= 1;
+     if(un & 1) value *= x;  /* for n odd */
+     un >>= 1;
      x *= x;
-  } while (n);
+  } while (un);
 
   return value;
 }