replace strdup by copy

ChangeLog

@@ -1,3 +1,6 @@
+2009-11-07 Holger Vogt
+ * winmain.c: replace strdup()y copy()
+
 2009-10-31 Holger Vogt
  * winmain.c: windows updated more often
    how-to-ngspice-vstudio.txt: updated 

src/winmain.c

@@ -670,7 +670,7 @@ int MakeArgcArgv(char *cmdline,int *argc,char ***argv)
     {
     /*  make a copy of the string so that we can modify it
             without messing up the original */
-        pWorkString = strdup(cmdline);
+        pWorkString = copy(cmdline);
         if (NULL == pWorkString)
             return -1; /* memory allocation error */
         /*  Now, to make sure we don't have any quoted arguments