eliminate warnings for compilation with -Wformat=2

git-svn-id: https://vdr-muggle.svn.sourceforge.net/svnroot/vdr-muggle/trunk/muggle-plugin@931 e10066b5-e1e2-0310-b819-94efdf66514b

3 files changed, 15 insertions, 8 deletions

diff --git a/Makefile b/Makefile
index 1de3872..2871744 100644
--- a/Makefile
+++ b/Makefile
@@ -35,7 +35,7 @@ VERSION = $(shell grep 'static const char \*VERSION *=' $(PLUGIN).c | awk '{ pri
 ### The C++ compiler and options:
 
 CXX      ?= g++-3.3
-CXXFLAGS ?= -fPIC -O0 -Wall -Woverloaded-virtual -Wno-deprecated -g
+CXXFLAGS ?= -fPIC -O0 -Wall -Wformat=2 -Woverloaded-virtual -Wno-deprecated -g
 
 ### The directory environment:
 
diff --git a/vdr_menu.c b/vdr_menu.c
index 583b9ba..2775487 100644
--- a/vdr_menu.c
+++ b/vdr_menu.c
@@ -818,11 +818,15 @@ mgTree::BuildOsd ()
     AddSelectionItems (selection());
 }
 
-void
-mgMainMenu::Message1(const char *msg, const char *arg1)
-{
-    if (strlen(msg)==0) return;
-    asprintf (&m_message, tr (msg), arg1);
+const char*
+mgMainMenu::Message1(const char *msg, ...)
+{
+    if (strlen(msg)==0) return 0;
+    va_list ap;
+    va_start(ap, msg);
+    vasprintf(&m_message, tr(msg), ap);
+    va_end(ap);
+    return m_message;
 }
 
 
diff --git a/vdr_menu.h b/vdr_menu.h
index 08028c9..ad8c9ba 100644
--- a/vdr_menu.h
+++ b/vdr_menu.h
@@ -175,8 +175,11 @@ class mgMainMenu:public cOsdMenu
 	// only be shown at the end of the next mgMainMenu::ProcessKey
 	// because that might do forcerefresh which overwrites the message
 	void Message (const char *msg) { m_message = strdup(msg); }
-        void Message1 (const char *msg, const char *arg1);
-        void Message1 (const char *msg, std::string arg1) { Message1(msg,arg1.c_str()); }
+        const char* Message1 (const char *msg, ...)
+		__attribute__ ((format (printf, 2, 3)));
+        const char* Message1 (const char *msg, std::string arg1)
+		__attribute_format_arg__ (2) 
+ 		{ return Message1(msg,arg1.c_str()); }
 
 	//! \brief Actions can request a new position. -1 means none wanted
 	int newposition;