Fixed #11180 (False positive: misra-c2012-8.1 for code 'unsigned x;')

addons/misra.py

@@ -1842,7 +1842,7 @@ class MisraChecker:
 
     def misra_8_1(self, cfg):
         for token in cfg.tokenlist:
-            if token.isImplicitInt:
+            if token.isImplicitInt and not token.isUnsigned and not token.isSigned:
                 self.reportError(token, 8, 1)
 
     def misra_8_2(self, data, rawTokens):

addons/test/misra/misra-test.c

@@ -45,7 +45,7 @@
 typedef struct {
   union { // 19.2
     struct {
-      unsigned a : 2; // 8.1
+      unsigned a : 2;
       unsigned : 14;
     };
     uint16_t value;