cleanup

- fix possible crash in conc (but it's still an ugly hack)
- fix noob usage of strcmp
- flag some memory leaks (it would be nice, if the author(s) would clean
   up the mess himself)
- fix crash in substr
- whitespace cleanup

there are plenty more memory leaks in command.cpp - for example, every
goto in cubescript does not clean up anything

source/src/main.cpp

@@ -1306,7 +1306,7 @@ int main(int argc, char **argv)
             // in the screenshot regardless of which frame buffer is current
             if (!minimized)
             {
-                gl_drawframe(screen->w, screen->h, fps<lowfps ? fps/lowfps : (fps>highfps ? fps/highfps : 1.0f), fps);           
+                gl_drawframe(screen->w, screen->h, fps<lowfps ? fps/lowfps : (fps>highfps ? fps/highfps : 1.0f), fps);
             }
             addsleep(0, "screenshot");
             needsautoscreenshot = false;
@@ -1330,4 +1330,4 @@ int main(int argc, char **argv)
 }
 
 VAR(version, 1, AC_VERSION, 0);
-VAR(protocol, 1, PROTOCOL_VERSION, 0);
+VAR(protocol, 1, PROTOCOL_VERSION, 0);