add some assertions

diff --git a/lib/gdi/grc.cpp b/lib/gdi/grc.cpp
index 4b2c555..1f1b06a 100644 (file)
--- a/lib/gdi/grc.cpp
+++ b/lib/gdi/grc.cpp
@@ -330,6 +330,7 @@ void gPainter::renderPara(eTextPara *para, ePoint offset)
 {
        if ( m_dc->islocked() )
                return;
+       ASSERT(para);
        gOpcode o;
        o.opcode=gOpcode::renderPara;
        o.dc = m_dc.grabRef();
@@ -409,6 +410,7 @@ void gPainter::setPalette(gRGB *colors, int start, int len)
 {
        if ( m_dc->islocked() )
                return;
+       ASSERT(colors);
        gOpcode o;
        o.opcode=gOpcode::setPalette;
        o.dc = m_dc.grabRef();
@@ -434,6 +436,7 @@ void gPainter::mergePalette(gPixmap *target)
 {
        if ( m_dc->islocked() )
                return;
+       ASSERT(target);
        gOpcode o;
        o.opcode = gOpcode::mergePalette;
        o.dc = m_dc.grabRef();