geanysendmail: Drop use of deprecated GdkPixbuf inline data

Use XPM data instead, which is simpler and totally good enough here.

Closes geany#256.

geanysendmail/src/Makefile.am

@@ -2,7 +2,7 @@ include $(top_srcdir)/build/vars.build.mk
 
 geanyplugins_LTLIBRARIES = geanysendmail.la
 
-geanysendmail_la_SOURCES = geanysendmail.c icon.h
+geanysendmail_la_SOURCES = geanysendmail.c mail-icon.xpm
 geanysendmail_la_LIBADD = $(COMMONLIBS)
 
 include $(top_srcdir)/build/cppcheck.mk

geanysendmail/src/geanysendmail.c

@@ -29,7 +29,7 @@
 #endif
 
 #include <geanyplugin.h>
-#include "icon.h"
+#include "mail-icon.xpm"
 
 GeanyPlugin		*geany_plugin;
 GeanyData		*geany_data;
@@ -199,7 +199,7 @@ static void add_stock_item(void)
 	}
 	else
 	{
-		GdkPixbuf *pb = gdk_pixbuf_new_from_inline(-1, mail_pixbuf, FALSE, NULL);
+		GdkPixbuf *pb = gdk_pixbuf_new_from_xpm_data(mail_icon);
 		icon_set = gtk_icon_set_new_from_pixbuf(pb);
 		g_object_unref(pb);
 	}

geanysendmail/src/mail-icon.xpm

@@ -0,0 +1,44 @@
+/* XPM */
+static const char *mail_icon[] = {
+/* columns rows colors chars-per-pixel */
+"13 10 28 1 ",
+"  c black",
+". c #282828",
+"X c #323232",
+"o c gray24",
+"O c #3F3F3F",
+"+ c #464646",
+"@ c gray28",
+"# c gray55",
+"$ c #A0A0A0",
+"% c #A7A7A7",
+"& c #AAAAAA",
+"* c gray73",
+"= c gray74",
+"- c gray75",
+"; c #C1C1C1",
+": c #CDCDCD",
+"> c LightGray",
+", c gray84",
+"< c #DADADA",
+"1 c #E9E9E9",
+"2 c #EAEAEA",
+"3 c gray92",
+"4 c #EFEFEF",
+"5 c gray95",
+"6 c #F3F3F3",
+"7 c #F4F4F4",
+"8 c gray96",
+"9 c None",
+/* pixels */
+"9           9",
+" @888888888X ",
+" 8@8888868@- ",
+" 82@88688@2& ",
+" 888@888O422 ",
+" 684@O8@@86- ",
+" 88@88@86@,$ ",
+" 8@688666*X2 ",
+" @$$#-*<:%>. ",
+"9           9"
+};