Fix wchar_t format string types

Signed-off-by: Anders Kaseorg <andersk@mit.edu>

src/terminal/parseraction.cc

@@ -28,7 +28,10 @@ std::string Action::str( void )
 {
   char thechar[ 10 ] = { 0 };
   if ( char_present ) {
-    snprintf( thechar, 10, iswprint( ch ) ? "(%lc)" : "(0x%x)", ch );
+    if ( iswprint( ch ) )
+      snprintf( thechar, 10, "(%lc)", ch );
+    else
+      snprintf( thechar, 10, "(0x%x)", (unsigned int)ch );
   }
 
   return name() + std::string( thechar );

src/terminal/terminaldisplay.cc

@@ -246,7 +246,7 @@ void Display::put_cell( bool initialized, FrameState &frame, const Framebuffer &
 
   /* cells that begin with combining character get combiner attached to no-break space */
   if ( cell->fallback ) {
-    snprintf( tmp, 64, "%lc", 0xA0 );
+    snprintf( tmp, 64, "%lc", L'\xA0' );
     frame.append( tmp );
   }