Fix implicit int truncating points in 64 bit systems.
--- a/src/mulGlobal.h
+++ b/src/mulGlobal.h
@@ -77,6 +77,8 @@
 /* #define MALCORE malloc */
 #define MALCORE ualloc
 
+extern char *ualloc(unsigned int);
+
 /* counts of memory usage by multipole matrix type */
 extern long memcount;
 extern long memQ2M;