Patch for Fedora Core 5 "Unknown class" error or anything using gcc 4 and up

[Fangtu Qiu <qiu@xxxxxxx>]

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Due to gcc4 is used in Fedora Core 5, the inventor program will say
"Unknown class xxx" when locating DSOs. The attached patch eliminates
this bug.

- -Fangtu
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diff -Nur inventor.orig/lib/database/src/so/SoType.c++ 
inventor/lib/database/src/so/SoType.c++
--- inventor.orig/lib/database/src/so/SoType.c++        2003-07-11 
18:40:53.000000000 -0400
+++ inventor/lib/database/src/so/SoType.c++     2006-06-13 15:22:50.000000000 
-0400
@@ -295,7 +295,7 @@
        if (dsoHandle  == NULL)
            return SoType::badType();
 
-#if ((__GNUC__ == 3) && (__GNUC_MINOR__ >= 1))
+#if (((__GNUC__ == 3) && (__GNUC_MINOR__ >= 1)) || __GNUC__ > 3)
 #define DUMMY_FUNC "_ZN%d%s9initClassEv"
 #else
 #define DUMMY_FUNC "initClass__%d%s%s"