Fix use of uninitialized bool value (#100560)

Fixes #100559

Author: AaronRobinsonMSFT

src/coreclr/vm/methodtablebuilder.cpp

@@ -2783,7 +2783,7 @@ MethodTableBuilder::EnumerateClassMethods()
             }
         }
 
-        bool hasGenericMethodArgsComputed;
+        bool hasGenericMethodArgsComputed = false;
         bool hasGenericMethodArgs = this->GetModule()->m_pMethodIsGenericMap->IsGeneric(tok, &hasGenericMethodArgsComputed);
         if (!hasGenericMethodArgsComputed)
         {

src/coreclr/vm/readytoruninfo.cpp

@@ -1929,20 +1929,17 @@ bool ReadyToRun_TypeGenericInfoMap::HasConstraints(mdTypeDef input, bool *foundR
 
 bool ReadyToRun_MethodIsGenericMap::IsGeneric(mdMethodDef input, bool *foundResult) const
 {
-#ifdef DACCESS_COMPILE
-    *foundResult = false;
-    return false;
-#else
+#ifndef DACCESS_COMPILE
     uint32_t rid = RidFromToken(input);
-    if ((rid > MethodCount) || (rid == 0))
+    if ((rid <= MethodCount) && (rid != 0))
     {
-        *foundResult = false;
-        return false;
+        uint8_t chunk = ((uint8_t*)&MethodCount)[((rid - 1) / 8) + sizeof(uint32_t)];
+        chunk >>= 7 - ((rid - 1) % 8);
+        *foundResult = true;
+        return !!(chunk & 1);
     }
-
-    uint8_t chunk = ((uint8_t*)&MethodCount)[((rid - 1) / 8) + sizeof(uint32_t)];
-    chunk >>= 7 - ((rid - 1) % 8);
-    return !!(chunk & 1);
-#endif
+#endif // !DACCESS_COMPILE
+    *foundResult = false;
+    return false;
 }