init: verify size of property buffers passed to property_get

Verify that the buffer passed as the value parameter to property_get
is always big enough.

Change-Id: Ie5b6fcd94bb908215cfd55d0c9b07f717ddb70b1
diff --git a/init/property_service.c b/init/property_service.c
index 79ff6c0..846a0a3 100644
--- a/init/property_service.c
+++ b/init/property_service.c
@@ -272,7 +272,7 @@
     return 0;
 }
 
-int property_get(const char *name, char value[PROP_VALUE_MAX])
+int __property_get(const char *name, char *value)
 {
     return __system_property_get(name, value);
 }