Fix skip bug on _, parent in Symbol

tests/include/test.h

@@ -129,6 +129,8 @@ ENUM6 test_call_etype_ptr6();
 union union3 test_call_utype3();
 UNION3 test_call_etype_ptr3();
 
+typedef struct _Kernel { char name; } *Kernel;
+
 #ifdef __cplusplus
 }
 #endif

tests/tnimterop_c.nim

@@ -13,7 +13,10 @@ cPlugin:
   import strutils
 
   proc onSymbol*(sym: var Symbol) {.exportc, dynlib.} =
-    sym.name = sym.name.strip(chars={'_'})
+    if sym.name == "_Kernel":
+      sym.name = "uKernel"
+    else:
+      sym.name = sym.name.strip(chars={'_'})
 
 cImport cSearchPath "test.h"
 
@@ -130,6 +133,8 @@ var
   e6p: ENUM6
   u3: union3
   u3p: UNION3
+  k: uKernel
+  kp: Kernel
 
 cAddStdDir()