fix for possible uninitialized RNA strings, when RNA_string_get property is not found, initialize the string to "".

source/blender/makesrna/intern/rna_access.c

@@ -4007,10 +4007,13 @@ void RNA_string_get(PointerRNA *ptr, const char *name, char *value)
 {
 	PropertyRNA *prop= RNA_struct_find_property(ptr, name);
 
-	if(prop)
+	if(prop) {
 		RNA_property_string_get(ptr, prop, value);
-	else
+	}
+	else {
 		printf("RNA_string_get: %s.%s not found.\n", ptr->type->identifier, name);
+		value[0]= '\0';
+	}
 }
 
 char *RNA_string_get_alloc(PointerRNA *ptr, const char *name, char *fixedbuf, int fixedlen)

source/blender/windowmanager/intern/wm_operators.c

@@ -1621,7 +1621,6 @@ static int wm_link_append_exec(bContext *C, wmOperator *op)
 	int idcode, totfiles=0;
 	short flag;
 
-	name[0] = '\0';
 	RNA_string_get(op->ptr, "filename", name);
 	RNA_string_get(op->ptr, "directory", dir);