Patch by Debarshi Ray <rishi@fedoraproject.org> for libical >= 0.46, which replaces the broken
overlefts regarding ICAL_ERRORS_ARE_FATAL preprocessor conditions by correct ones. Since libical
0.43, errors are set to be non-fatal by default. Configure has "#define ICAL_ERRORS_ARE_FATAL 0"
which simply invalidates "#ifndef" and thus breaks applications like e.g. Zarafa Groupware. More
details can be found at: https://bugzilla.redhat.com/show_bug.cgi?id=575715

Upstream link: https://sourceforge.net/tracker/?func=detail&aid=3140405&group_id=16077&atid=316077

--- libical-0.46/src/libical/autogenex/ical.h			2010-08-30 22:05:05.000000000 +0200
+++ libical-0.46/src/libical/autogenex/ical.h.errors-are-fatal	2010-12-19 21:39:10.000000000 +0100
@@ -3272,7 +3272,7 @@
 void icalerror_set_errno(icalerrorenum x);
 #endif
 
-#ifdef ICAL_ERRORS_ARE_FATAL
+#if ICAL_ERRORS_ARE_FATAL == 1
 #undef NDEBUG
 #endif
 
@@ -3282,7 +3282,7 @@
 #define icalerror_check_component_type(value,type);
 
 /* Assert with a message */
-#ifdef ICAL_ERRORS_ARE_FATAL
+#if ICAL_ERRORS_ARE_FATAL == 1
 
 #ifdef __GNUC__
 #define icalerror_assert(test,message) if(!(test)){fprintf(stderr,"%s(), %s:%d: %s\n",__FUNCTION__,__FILE__,__LINE__,message);icalerror_stop_here(); abort();}
--- libical-0.46/src/libical/icalerror.h			2010-08-30 22:05:06.000000000 +0200
+++ libical-0.46/src/libical/icalerror.h.errors-are-fatal	2010-12-19 21:40:12.000000000 +0100
@@ -121,7 +121,7 @@
 void icalerror_set_errno(icalerrorenum x); 
 #endif
 
-#ifdef ICAL_ERRORS_ARE_FATAL
+#if ICAL_ERRORS_ARE_FATAL == 1
 #undef NDEBUG
 #endif
 
@@ -131,7 +131,7 @@
 #define icalerror_check_component_type(value,type);
 
 /* Assert with a message */
-#ifdef ICAL_ERRORS_ARE_FATAL
+#if ICAL_ERRORS_ARE_FATAL == 1
 
 #ifdef __GNUC__
 #define icalerror_assert(test,message) if(!(test)){fprintf(stderr,"%s(), %s:%d: %s\n",__FUNCTION__,__FILE__,__LINE__,message);icalerror_stop_here(); abort();}
--- libical-0.46/src/libical/icalparser.c			2010-08-30 22:05:06.000000000 +0200
+++ libical-0.46/src/libical/icalparser.c.errors-are-fatal	2010-12-19 21:41:18.000000000 +0100
@@ -930,10 +930,7 @@
 
                 /* Change for mozilla */
                 /* have the option of being flexible towards unsupported parameters */
-                #ifndef ICAL_ERRORS_ARE_FATAL
-                continue;
-                #endif
-
+		#if ICAL_ERRORS_ARE_FATAL == 1
 		insert_error(tail, str, "Cant parse parameter name",
 			     ICAL_XLICERRORTYPE_PARAMETERNAMEPARSEERROR);
 		tail = 0;
@@ -947,6 +944,9 @@
 			name = 0;
 		}
 		return 0;
+		#else
+		continue;
+		#endif
 	    }
 
 	    /* if (pvalue) {