The "open a whisky and cut your finger open" patch

Make integer constant parsing C99 compliant

tests/tests2/72_long_long_constant.c

@@ -0,0 +1,17 @@
+#include <stdio.h>
+
+int main()
+{
+    long long int res = 0;
+
+    if (res < -2147483648LL) {
+        printf("Error: 0 < -2147483648\n");
+        return 1;
+    }
+    else
+    if (2147483647LL < res) {
+        printf("Error: 2147483647 < 0\n");
+        return 2;
+    }
+    return 0;
+}