fixed some pointer arithmetic issue on non GNU compilers.

CMakeLists.txt

@@ -4,7 +4,7 @@ if(NOT CMAKE_BUILD_TYPE)
 	set(CMAKE_BUILD_TYPE Release)
 endif()
 
-set(CMAKE_C_FLAGS "-Wall -Wextra -pedantic -fsanitize=address -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wno-pointer-arith")
+set(CMAKE_C_FLAGS "-Wall -Wextra -pedantic -fsanitize=address -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations")
 set(CMAKE_C_FLAGS_DEBUG "-g -Werror")
 set(CMAKE_C_FLAGS_RELEASE "-O2")
 

src/fomod/xmlUtil.c

@@ -1,6 +1,7 @@
 #include "xmlUtil.h"
 
 #include <string.h>
+#include <sys/types.h>
 
 char * freeAndDup(xmlChar * line) {
 	char * free = strdup((const char *) line);
@@ -29,8 +30,9 @@ void fixPath(char * path) {
 
 int countUntilNull(void * pointers, size_t typeSize) {
 	int i = 0;
-	while(pointers != NULL) {
-		pointers += typeSize;
+	char * arithmetic = (char *)pointers;
+	while(arithmetic != NULL) {
+		arithmetic += typeSize;
 		i++;
 	}
 	return i;