shiboken: Fix a warning introduced by g++ 8 in the generated code

PySide2/QtWidgets/PySide2/QtWidgets/qgraphicsscenehoverevent_wrapper.cpp:95:12:
warning: ‘char* strncpy(char*, const char*, size_t)’ output truncated
before terminating nul copying 28 bytes from a string of the same
length [-Wstringop-truncation]

Use the correct length and use memcpy().

Change-Id: I0830cd9b499f2f49a1f3334c2407f877e79738d4
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>

1 files changed, 4 insertions, 2 deletions

diff --git a/sources/shiboken2/generator/shiboken2/cppgenerator.cpp b/sources/shiboken2/generator/shiboken2/cppgenerator.cpp
index 86a632e78..be9d426b5 100644
--- a/sources/shiboken2/generator/shiboken2/cppgenerator.cpp
+++ b/sources/shiboken2/generator/shiboken2/cppgenerator.cpp
@@ -68,12 +68,14 @@ static const char *typeNameOf(const T &t)
         size = lastStar - typeName + 1;
     }
 #else // g++, Clang: "QPaintDevice *" -> "P12QPaintDevice"
-    if (size > 2 && typeName[0] == 'P' && std::isdigit(typeName[1]))
+    if (size > 2 && typeName[0] == 'P' && std::isdigit(typeName[1])) {
         ++typeName;
+        --size;
+    }
 #endif
     char *result = new char[size + 1];
     result[size] = '\0';
-    strncpy(result, typeName, size);
+    memcpy(result, typeName, size);
     return result;
 }
 )CPP";