Catch not just the generic utf8 exception, but a few specific ones as well (bug #244)

src/modules/graphics/opengl/Font.cpp

@@ -174,6 +174,16 @@ namespace opengl
 				dx += glyph->spacing;
 			}
 		}
+		catch (utf8::invalid_code_point e)
+		{
+			glPopMatrix();
+			throw love::Exception(e.what());
+		}
+		catch (utf8::invalid_utf8 e)
+		{
+			glPopMatrix();
+			throw love::Exception(e.what());
+		}
 		catch (utf8::exception e)
 		{
 			glPopMatrix();
@@ -210,6 +220,16 @@ namespace opengl
 				temp += static_cast<int>(g->spacing * mSpacing);
 			}
 		}
+		catch (utf8::invalid_code_point e)
+		{
+			glPopMatrix();
+			throw love::Exception(e.what());
+		}
+		catch (utf8::invalid_utf8 e)
+		{
+			glPopMatrix();
+			throw love::Exception(e.what());
+		}
 		catch (utf8::exception e)
 		{
 			throw love::Exception(e.what());