Removed casting for strictier syntax of recent gcc compilers.

ChangeLog

@@ -1,3 +1,8 @@
+2005-08-22  Paolo Nenzi <p.nenzi@ieee.org>
+
+  *  src/frontend/plotting/x11.c: removed casting in a macro. It conflicts
+     with the strictier syntax of recent gcc compilers. 
+
 2005-08-15  Steven Borley <steven.borley@virgin.net>
 
   *  Yet more changes to the doc build system - see doc/ChangeLog for details

src/frontend/plotting/x11.c

@@ -301,7 +301,7 @@ handlebuttonev(Widget w, caddr_t clientdata, caddr_t calldata)
 
 
 /* Recover from bad NewViewPort call. */
-#define RECOVERNEWVIEWPORT()    tfree((char *) graph);\
+#define RECOVERNEWVIEWPORT()    tfree(graph);\
 	            graph = (GRAPH *) NULL; 
 	    /* need to do this or else DestroyGraph will free it again */