Add NZV() macro for checking a char* points to a non-empty string.

git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/trunk@1493 ea778897-0a13-0410-b9d1-a72fbfd435f5

src/utils.h

@@ -25,6 +25,10 @@
 #ifndef GEANY_UTILS_H
 #define GEANY_UTILS_H 1
 
+// Returns: TRUE if ptr points to a non-zero value.
+#define NZV(ptr) \
+	((ptr) && (ptr)[0])
+
 
 void utils_start_browser(const gchar *uri);