Use LoadLibraryA instead of LoadLibraryW

We're loading an ascii-only name anyway so no need to do utf-16
weirdness.

Author: alexcrichton

src/dbghelp.rs

@@ -106,22 +106,9 @@ macro_rules! dbghelp {
             /// Panics if library is already loaded.
             fn open(&mut self) -> Result<(), ()> {
                 assert!(self.dll.is_null());
-                let lib = [
-                    'd' as u16,
-                    'b' as u16,
-                    'g' as u16,
-                    'h' as u16,
-                    'e' as u16,
-                    'l' as u16,
-                    'p' as u16,
-                    '.' as u16,
-                    'd' as u16,
-                    'l' as u16,
-                    'l' as u16,
-                    0,
-                ];
+                let lib = b"dbghelp.dll\0";
                 unsafe {
-                    self.dll = LoadLibraryW(lib.as_ptr());
+                    self.dll = LoadLibraryA(lib.as_ptr() as *const i8);
                     if self.dll.is_null() {
                         Err(())
                     }  else {

src/windows.rs

@@ -339,7 +339,7 @@ ffi! {
         pub fn GetCurrentProcess() -> HANDLE;
         pub fn GetCurrentThread() -> HANDLE;
         pub fn RtlCaptureContext(ContextRecord: PCONTEXT) -> ();
-        pub fn LoadLibraryW(a: *const u16) -> HMODULE;
+        pub fn LoadLibraryA(a: *const i8) -> HMODULE;
         pub fn FreeLibrary(h: HMODULE) -> BOOL;
         pub fn GetProcAddress(h: HMODULE, name: *const i8) -> FARPROC;
         pub fn OpenProcess(
@@ -567,7 +567,7 @@ ffi! {
     //     pub High: LONG64,
     // }
 
-    // pub type PNEON128 = *mut NEON128;    
+    // pub type PNEON128 = *mut NEON128;
 
     #[repr(C)]
     pub struct CONTEXT_u {
@@ -578,7 +578,7 @@ ffi! {
 
     pub const ARM_MAX_BREAKPOINTS: usize = 8;
     pub const ARM_MAX_WATCHPOINTS: usize = 1;
-    
+
     #[repr(C)]
     pub struct CONTEXT {
         pub ContextFlags: DWORD,