mbed library sources. Supersedes mbed-src. Fixed broken STM32F1xx RTC on rtc_api.c

Dependents:   Nucleo_F103RB_RTC_battery_bkup_pwr_off_okay

Fork of mbed-dev by mbed official

Revision:
167:e84263d55307
Parent:
160:d5399cc887bb
Child:
169:e3b6fe271b81
--- a/platform/mbed_rtc_time.cpp	Thu Jun 08 15:02:37 2017 +0100
+++ b/platform/mbed_rtc_time.cpp	Wed Jun 21 17:46:44 2017 +0100
@@ -53,7 +53,7 @@
         }
     }
     
-    time_t t = 0;
+    time_t t = -1;
     if (_rtc_read != NULL) {
         t = _rtc_read();
     }