Debugger: Fix CDB autodetection for 32bit builds on 64bit systems.

src/plugins/debugger/cdb/cdboptions.cpp

@@ -242,12 +242,16 @@ bool CdbOptions::autoDetectExecutable(QString *outPath, bool *is64bitIn  /* = 0
         return true;
     }
 #else
-    *outPath = checkCdbExecutable(programDir + QLatin1String(" (x64)"), QString(), checkedDirectories);
+    // A 32bit process on 64 bit sees "ProgramFiles\Debg.. (x64)"
+    if (programDir.endsWith(QLatin1String(" (x86)"))) {
+        *outPath = checkCdbExecutable(programDir.left(programDir.size() - 6),
+                                      QLatin1String(" (x64)"), checkedDirectories);
         if (!outPath->isEmpty()) {
             if (is64bitIn)
                 *is64bitIn = true;
             return true;
         }
+    }
 #endif
     return false;
 }