-Wpointer-sign: python/.

This fixes -Wpointer-sign warnings in the python/ code in the manner
that seems most appropriate to me.

gdb/
2013-04-19  Pedro Alves  <palves@redhat.com>

	* python/py-inferior.c (infpy_write_memory): Add cast to gdb_byte
	* python/py-prettyprint.c (print_string_repr): Change type of
	'output' local to char *.  Add cast to gdb_byte * in
	LA_PRINT_STRING call.
	(print_children): Change type of 'output' local to char *.
	* python/py-value.c (valpy_string): Add cast to const char * in
	PyUnicode_Decode call.

gdb/ChangeLog

@@ -1,3 +1,13 @@
+2013-04-19  Pedro Alves  <palves@redhat.com>
+
+	* python/py-inferior.c (infpy_write_memory): Add cast to gdb_byte
+	* python/py-prettyprint.c (print_string_repr): Change type of
+	'output' local to char *.  Add cast to gdb_byte * in
+	LA_PRINT_STRING call.
+	(print_children): Change type of 'output' local to char *.
+	* python/py-value.c (valpy_string): Add cast to const char * in
+	PyUnicode_Decode call.
+
 2013-04-19  Pedro Alves  <palves@redhat.com>
 
 	* remote-mips.c (mips_cksum): Rename 'data' parameter to 'datastr'

gdb/python/py-inferior.c

@@ -513,7 +513,7 @@ infpy_write_memory (PyObject *self, PyObject *args, PyObject *kw)
 	  error = 1;
 	  break;
 	}
-      write_memory_with_notification (addr, buffer, length);
+      write_memory_with_notification (addr, (gdb_byte *) buffer, length);
     }
 #ifdef IS_PY3K
   PyBuffer_Release (&pybuf);

gdb/python/py-prettyprint.c

@@ -343,13 +343,13 @@ print_string_repr (PyObject *printer, const char *hint,
 	  string = python_string_to_target_python_string (py_str);
 	  if (string)
 	    {
-	      gdb_byte *output;
+	      char *output;
 	      long length;
 	      struct type *type;
 
 	      make_cleanup_py_decref (string);
 #ifdef IS_PY3K
-	      output = (gdb_byte *) PyBytes_AS_STRING (string);
+	      output = PyBytes_AS_STRING (string);
 	      length = PyBytes_GET_SIZE (string);
 #else
 	      output = PyString_AsString (string);
@@ -358,8 +358,8 @@ print_string_repr (PyObject *printer, const char *hint,
 	      type = builtin_type (gdbarch)->builtin_char;
 
 	      if (hint && !strcmp (hint, "string"))
-		LA_PRINT_STRING (stream, type, output, length, NULL,
-				 0, options);
+		LA_PRINT_STRING (stream, type, (gdb_byte *) output,
+				 length, NULL, 0, options);
 	      else
 		fputs_filtered (output, stream);
 	    }
@@ -634,7 +634,7 @@ print_children (PyObject *printer, const char *hint,
 	}
       else if (gdbpy_is_string (py_v))
 	{
-	  gdb_byte *output;
+	  char *output;
 
 	  output = python_string_to_host_string (py_v);
 	  if (!output)

gdb/python/py-value.c

@@ -421,7 +421,8 @@ valpy_string (PyObject *self, PyObject *args, PyObject *kw)
   GDB_PY_HANDLE_EXCEPTION (except);
 
   encoding = (user_encoding && *user_encoding) ? user_encoding : la_encoding;
-  unicode = PyUnicode_Decode (buffer, length * TYPE_LENGTH (char_type),
+  unicode = PyUnicode_Decode ((const char *) buffer,
+			      length * TYPE_LENGTH (char_type),
 			      encoding, errors);
   xfree (buffer);