[gnome-calculator] Avoid empty body of conditional statement

[Michael Catanzaro <mcatanzaro src gnome org>]

commit ab783953f152e87cd6888e6cfc4c70840c648f35
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Wed Oct 22 21:28:59 2014 -0500

    Avoid empty body of conditional statement
    
    Vala is warning about this now, and it makes the code a bit harder to
    read.

 src/math-equation.vala |   15 ++++++++-------
 1 files changed, 8 insertions(+), 7 deletions(-)
---
diff --git a/src/math-equation.vala b/src/math-equation.vala
index 1cf0dbd..d9441e3 100644
--- a/src/math-equation.vala
+++ b/src/math-equation.vala
@@ -684,13 +684,14 @@ public class MathEquation : Gtk.SourceBuffer
                     next_is_digit = next_char.isdigit ();
 
                 /* Ignore thousands separators */
-                if (c == serializer.get_thousands_separator () && last_is_digit && next_is_digit)
-                    ;
-                /* Substitute radix character */
-                else if (c == serializer.get_radix () && (last_is_digit || next_is_digit))
-                    eq_text += ".";
-                else
-                    eq_text += c.to_string ();
+                if (c != serializer.get_thousands_separator () || !last_is_digit || !next_is_digit)
+                {
+                    /* Substitute radix character */
+                    if (c == serializer.get_radix () && (last_is_digit || next_is_digit))
+                        eq_text += ".";
+                    else
+                        eq_text += c.to_string ();
+                }
 
                 last_is_digit = is_digit;
             }