Fix build with PHP 7.4

PR:		248961
Submitted by:	garga

databases/pecl-rrd/Makefile

@@ -12,6 +12,5 @@ LICENSE=	PHP301
 
 LIB_DEPENDS=	librrd.so:databases/rrdtool
 USES=		php:pecl localbase pkgconfig
-IGNORE_WITH_PHP=	74
 
 .include <bsd.port.mk>

databases/pecl-rrd/files/patch-rrd.c

@@ -0,0 +1,25 @@
+--- rrd.c.orig	2020-08-28 12:06:18 UTC
++++ rrd.c
+@@ -55,7 +55,7 @@ PHP_FUNCTION(rrd_fetch)
+ 	rrd_args *argv;
+ 	/* returned values if rrd_fetch doesn't fail */
+ 	time_t start, end;
+-	ulong step,
++	u_long step,
+ 	ds_cnt; /* count of data sources */
+ 	char **ds_namv; /* list of data source names */
+ 	rrd_value_t *ds_data; /* all data from all sources */
+@@ -396,11 +396,11 @@ PHP_FUNCTION(rrd_xport)
+ 	/* return values from rrd_xport */
+ 	int xxsize;
+ 	time_t start, end, time_index;
+-	ulong step, outvar_count;
++	u_long step, outvar_count;
+ 	char **legend_v;
+ 	rrd_value_t *data, *data_ptr;
+ 	zval zv_data;
+-	ulong outvar_index;
++	u_long outvar_index;
+ 
+ 	if (zend_parse_parameters(ZEND_NUM_ARGS(), "a", &zv_arr_options) == FAILURE) {
+ 		return;