This patch fixes vendor SDK header "c_types.h" for C99 compatibility.

diff -ur esp_iot_sdk_v0.9.4.org/include/c_types.h esp_iot_sdk_v0.9.4/include/c_types.h
--- esp_iot_sdk_v0.9.4.org/include/c_types.h	2014-12-19 18:07:46.000000000 +0200
+++ esp_iot_sdk_v0.9.4/include/c_types.h	2015-01-17 19:43:49.258975759 +0200
@@ -6,6 +6,9 @@
 #ifndef _C_TYPES_H_
 #define _C_TYPES_H_
 
+#include <stdint.h>
+#include <stdbool.h>
+#if 0
 typedef unsigned char       uint8_t;
 typedef signed char         sint8_t;
 typedef signed char         int8_t;
@@ -20,6 +23,7 @@
 typedef unsigned long long  u_int64_t;
 typedef float               real32_t;
 typedef double              real64_t;
+#endif
 
 typedef unsigned char       uint8;
 typedef unsigned char       u8;
@@ -78,10 +82,10 @@
 #endif /* ICACHE_FLASH */
 
 #ifndef __cplusplus
-typedef unsigned char   bool;
+//typedef unsigned char   bool;
 #define BOOL            bool
-#define true            (1)
-#define false           (0)
+//#define true            (1)
+//#define false           (0)
 #define TRUE            true
 #define FALSE           false