- fixed C++-style comment in strings/strtod.c which caused a compile

   error with the IBM xlc_r compiler

strings/strtod.c

@@ -36,7 +36,7 @@ static double scaler1[] = {
   1.0, 10.0, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9
 };
 
-// let's use a static array for not to accumulate the error
+/* let's use a static array for not to accumulate the error */
 static double pastpoint[] = {
   1e-1,  1e-2,  1e-3,  1e-4,  1e-5,  1e-6,  1e-7,  1e-8,  1e-9,
   1e-10, 1e-11, 1e-12, 1e-13, 1e-14, 1e-15, 1e-16, 1e-17, 1e-18,  1e-19,