Fix for some comments during if statements

added test files

compiler/c2nim/tests/vincent.c

@@ -0,0 +1,21 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+int rand(void);
+
+int main() {
+    float f = .2,
+          g = 2.,
+          h = 1.0+rand(),
+          i = 1.0e+3;
+    int j, a;
+    for(j = 0, a = 10; j < 0; j++, a++) ;
+    do {
+        printf("howdy");
+    } while(--i, 0);
+    if(1)
+        printf("1"); // error from this comment
+    else
+        printf("2");
+    return '\x00';
+}

compiler/c2nim/tests/vincent.h

@@ -0,0 +1,3 @@
+struct foo {
+    int x,y,z;
+};