(malloc, realloc, free) [emacs]: Undefine before

redefining, to avoid compiler warnings.

src/ChangeLog

@@ -1,5 +1,8 @@
 2001-05-12  Eli Zaretskii  <eliz@is.elta.co.il>
 
+	* regex.c (malloc, realloc, free) [emacs]: Undefine before
+	redefining, to avoid compiler warnings.
+
 	* w32proc.c: Include syssignal.h, to avoid compiler warnings.
 
 	* w32bdf.c (search_file_line, set_bdf_font_info, seek_char)

src/regex.c

@@ -124,8 +124,17 @@
 # include "charset.h"
 # include "category.h"
 
+# ifdef malloc
+#  undef malloc
+# endif
 # define malloc xmalloc
+# ifdef realloc
+#  undef realloc
+# endif
 # define realloc xrealloc
+# ifdef free
+#  undef free
+# endif
 # define free xfree
 
 /* Converts the pointer to the char to BEG-based offset from the start.	 */