Improvements to C snippets by Vivien Didelot

UltiSnips/c.snippets

@@ -1,7 +1,12 @@
 ###########################################################################
 #                            TextMate Snippets                            #
 ###########################################################################
-snippet def "#ifndef ... #define ... #endif"
+
+snippet def "#define ..."
+#define ${1}
+endsnippet
+
+snippet ifndef "#ifndef ... #define ... #endif"
 #ifndef ${1/([A-Za-z0-9_]+).*/$1/}
 #define ${1:SYMBOL} ${2:value}
 #endif

doc/UltiSnips.txt

@@ -1290,6 +1290,7 @@ Contributors listed in chronological order:
    Martin Krauskopf (martin-krauskopf)
    Theocrite (theocrite)
    Ferdinand Majerech (kiith-sa)
+   Vivien Didelot
 
 Thank you for your support.