[number] Turn hb_parse_float into hb_parse_double
diff --git a/src/hb-number.hh b/src/hb-number.hh
index 561620d..14d1260 100644
--- a/src/hb-number.hh
+++ b/src/hb-number.hh
@@ -35,7 +35,7 @@
 	       bool whole_buffer = false, int base = 10);
 
 HB_INTERNAL bool
-hb_parse_float (const char **pp, const char *end, float *pv,
-		bool whole_buffer = false);
+hb_parse_double (const char **pp, const char *end, double *pv,
+		 bool whole_buffer = false);
 
 #endif /* HB_NUMBER_HH */