Remove scilab and allegro specifics in 3 testcases

Examples/test-suite/char_strings.i

@@ -9,13 +9,9 @@ below.
 %warnfilter(SWIGWARN_TYPEMAP_VARIN_UNDEF) global_char_array1;  // Unable to set variable of type char[]
 %warnfilter(SWIGWARN_TYPEMAP_CHARLEAK_MSG) global_const_char;  // Setting a const char * variable may leak memory.
 
-#if defined(SWIG_ALLEGRO_CL) || defined(SWIGSCILAB)
 %{
 #include <stdio.h>
-%}
-#endif
 
-%{
 #define OTHERLAND_MSG "Little message from the safe world."
 #define CPLUSPLUS_MSG "A message from the deep dark world of C++, where anything is possible."
 static char *global_str = NULL;

Examples/test-suite/operator_overload.i

@@ -73,12 +73,6 @@ see bottom for a set of possible tests
 %rename(OrOperator) operator ||;
 #endif
 
-#if defined(SWIG_ALLEGRO_CL) || defined(SWIGSCILAB)
-%{
-#include <stdio.h>
-%}
-#endif
-
 #ifdef SWIGD
 // Due to the way operator overloading is implemented in D1 and D2, the prefix
 // increment/decrement operators (D1) resp. the postfix ones (D2) are ignored. 
@@ -89,6 +83,7 @@ see bottom for a set of possible tests
 %rename(DoubleCast) operator double();
 
 %inline %{
+#include <stdio.h>
 
 #if defined(_MSC_VER)
   #include <iso646.h> /* for named logical operator, eg 'operator or' */

Examples/test-suite/varargs_overload.i

@@ -2,13 +2,9 @@
 // The default behavior is to simply ignore the varargs.
 %module varargs_overload
 
-#if defined(SWIGSCILAB)
-%{
-#include <stdio.h>
-%}
-#endif
-
 %inline %{
+#include <stdio.h>
+
 const char *vararg_over1(const char *fmt, ...) {
   return fmt;
 }