Handle functions with anonymous arguments

Example:

int f(int a, int, int c) {
    return a + c;
}
diff --git a/libacc/tests/test.py b/libacc/tests/test.py
index ed20334..bef9fc6 100644
--- a/libacc/tests/test.py
+++ b/libacc/tests/test.py
@@ -439,6 +439,11 @@
 result: 3
 ""","""""")
 
+    def testFuncArgs(self):
+        self.compileCheck(["-R", "data/funcargs.c"], """Executing compiled code:
+result: 4
+""","""""")
+
 def main():
     parseArgv()
     if not outputCanRun():