c-m-rt: mark Vector as repr(C)

Author: adamgreig

cortex-m-rt/examples/device.rs

@@ -16,6 +16,7 @@ fn main() -> ! {
 }
 
 // interrupts portion of the vector table
+#[repr(C)]
 pub union Vector {
     handler: unsafe extern "C" fn(),
     reserved: usize,

cortex-m-rt/examples/warnings.rs

@@ -22,6 +22,7 @@ extern "C" {
     fn INT();
 }
 
+#[repr(C)]
 union Vector {
     #[allow(dead_code)]
     handler: unsafe extern "C" fn(),

cortex-m-rt/src/lib.rs

@@ -1128,6 +1128,7 @@ extern "C" {
 }
 
 #[doc(hidden)]
+#[repr(C)]
 pub union Vector {
     handler: unsafe extern "C" fn(),
     reserved: usize,