perf probe: Allow of casting an array of char to string

Before casting a type of a variable to string, convert_variable_type()
confirms that the type is a pointer or an array. then if it is a pointer
to char, it is casted to string.  but in case of an array of char, it
isn't

Signed-off-by: H.C. Lee <hyc.lee@gmail.com>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/CANFS6bb75e8a_UtyAD9yF73hfXDy0N8tSjDz=a+Vna=Y8ORMHg@mail.gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/probe-finder.c

@@ -413,12 +413,12 @@ static int convert_variable_type(Dwarf_Die *vr_die,
 				   dwarf_diename(vr_die), dwarf_diename(&type));
 			return -EINVAL;
 		}
+		if (die_get_real_type(&type, &type) == NULL) {
+			pr_warning("Failed to get a type"
+				   " information.\n");
+			return -ENOENT;
+		}
 		if (ret == DW_TAG_pointer_type) {
-			if (die_get_real_type(&type, &type) == NULL) {
-				pr_warning("Failed to get a type"
-					   " information.\n");
-				return -ENOENT;
-			}
 			while (*ref_ptr)
 				ref_ptr = &(*ref_ptr)->next;
 			/* Add new reference with offset +0 */