Add Octave test of global constants when accessed from a function reported by Alan W Irwin as previously not working

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@12476 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/test-suite/octave/preproc_constants_runme.m

@@ -0,0 +1,24 @@
+preproc_constants
+
+assert(CONST_INT1,      10)
+assert(CONST_DOUBLE3,   12.3)
+assert(CONST_BOOL1,     true)
+assert(CONST_CHAR,      'x')
+assert(CONST_STRING1,   "const string")
+
+# Test global constants can be seen within functions
+function test_global()
+global CONST_INT1
+global CONST_DOUBLE3
+global CONST_BOOL1
+global CONST_CHAR
+global CONST_STRING1
+
+assert(CONST_INT1,      10)
+assert(CONST_DOUBLE3,   12.3)
+assert(CONST_BOOL1,     true)
+assert(CONST_CHAR,      'x')
+assert(CONST_STRING1,   "const string")
+endfunction
+
+test_global